joseph lookup tech assignment # 1...power allowance for a retail building: 1.9w/ft2 area: 10,750 ft2...

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Joseph Lookup Tech Assignment # 1

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Wegmans Fairfax Center Existing Lighting Conditions & Design Criteria Report

Table of Contents

Table of Contents I Executive Summary II Market Café

Description 1 Reflected Ceiling Plans 2 Luminaire Schedule 3 Controls 4 LLF 4 Tasks 5 Design Criteria 6 Power Density 7 Finishes/Furnishings 8 System Performance & Critique 9

Main Offices


Restaurant/2nd Floor Dining Area


Outside Ground Level


Appendix

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Executive Summary: This report is setup to evaluate the existing lighting conditions for Wegmans Fairfax in Fairfax, Virginia. The report focuses on four areas inside the building; the market café, the main offices, the 2nd floor eating area, and the outside building façade along monument drive. Within the report there are technical evaluations of the luminaires, lamps, ballasts, controls, and detailed analysis of lighting systems performances. This report was created using the IES Handbook which helped set up design criteria for each individual space while also providing general IES standards and lighting system performance equations. ASHRAE 90.1 was also referenced for power allowances and control requirements for the four areas analyzed.

Joseph Lookup Lighting/Electrical

Primary Faculty Consultant: Dr. Mistrick

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Market Café Existing Lighting System: The overall lighting design of this space incorporates functional general ambient lighting with the suspended HID and Metal Halide luminaires. But most of the design focuses on accent lighting to attract the customers to the merchandising displays. The accent lighting is split up into two different areas; first there is accent lighting which is suspended down the middle of the space focusing on the middle merchandising displays and there is accent lighting along the perimeter that focuses on the displays along the perimeter. The majority of the accent lighting is provided with a fluorescent wall washer and par halogen lamp; alternating between the two sources. There is also a low voltage and incandescent sources used in the accent lighting.



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Existing Conditions Reflected Ceiling Plans:



PIZZA SECTION

From Section Line 7 to 4.4 From Section Line 4.4 to 2.2 A LA CARTE SECTTION

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Existing Condition Luminaire Schedule:

Luminaire

Luminaire Designation Symbol

Total # of luminaires Description Voltage

HCAP17

9 Decorative High Bay HID with Remote

Ballast 277

HCAP17EM

7 Decorative High Bay HID with Remote

Ballast and Quartz Auxiliary Lamp 277

T1510

14 PAR Holder with Cone Shroud 120

T4B

89 Fluorescent Track Wall Washer with

Acrylic Lens and 3500K Lamp 120

T16

125 Gimbal Ring with Barn Doors and 60W

PAR Halogen Lamp 120

T9

10 Low Voltage Trac Head 120

T12

6 Cord-Hung Pendant 120

T14C

10 Low Voltage Pendant 120

LAMPS

Luminaire Designation # of Lamps per

Luminaire Description Ordering Code

(Sylvania unless otherwise noted)

HCAP17 1 175 Metal Halide M175/C/U

1 175W Metal Halide M175/C/U HCAP17EM 1 150W Quartz 1500/CL/DC

T1510 1 100W PAR38 Metal Halide Phillips CDM100/PAR38/FL/4K

T4B 2 39W, 3500 BIAX Compact

Fluorescent FT36DL/835

T16 1 60W PAR Halogen 60/CAP/SPL/SP9-120

T9 1 50W MR16, 24 degree beam

spread Solux WQ50MR16/CG/35-24

T12 1 75W incandescent, A19 75A WRP

T14C 1 50W MR16, 24 degree beam

spread Solux WQ50MR16/CG/35-24



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Existing Control Systems: The control systems for this area are controlled by 3-way switching. There is no automatic shutoff but because it is open 24-hours for business there is an exception to ASHRAE 90.1 standards for lighting control. Existing Light Loss Factors:

RCR HIGH BAY = ((2.5)(18)(409))/(10,750) = 1.71 RCR Track lighting = ((2.5)(12)(409))/(10,750) = 1.14

BF:

HCAP17EM = 1.0 HCAP17EM = 1.0 T1510 = 1.0 T4B = 0.98 T16 = 1.0 T9 = 1.0 T12 = 1.0 T14C = 1.0

LLD:

HCAP17 = 8400/12000 = 0.7 HCAP17EM = 8400/12000 = 0.7 T1510: = 4800/6000 = 0.8 T4B = 2494/2900 = 0.86 T16 = = 1.0 T9 = = 1.0 T12 = 1000/1110 = 0.90 T14C = = 1.0

LDD:

HCAP17 = 0.90, Category III, Clean, 12 Month Cleaning Cycle HCAP17EM = 0.90, Category III, Clean, 12 Month Cleaning Cycle

T1510 = 0.90, Category III, Clean, 12 Month Cleaning Cycle T4B = 0.90, Category III, Clean, 12 Month Cleaning Cycle T16 = 0.90, Category III, Clean, 12 Month Cleaning Cycle T9 = 0.90, Category III, Clean, 12 Month Cleaning Cycle T12 = 0.90, Category III, Clean, 12 Month Cleaning Cycle T14C = 0.90, Category III, Clean, 12 Month Cleaning Cycle



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Light Loss Factors Continued:

RSDD: Semi-Direct 10% Depreciation RCR HIGH BAY = 1.71 RCR Track lighting = 1.14 RSDD High Bay = 0.96 RSDD Track Lighting = 0.97

AGI Conversion (Combining the RSDD’s and LDD for AGI Calc.’s) High Bay = 0.93 Track Lighting = 0.94

Total Light Loss Factor

HCAP17 = 0.61 HCAP17EM = 0.61 T1510 = 0.69 T4 = 0.74 T16 = 0.87 T9 = 0.87 T12 = 0.79 T14C = 0.87

Tasks:

Shop/Buying Fresh Food Products Shop/Buying General Products Sample Foods Set-up Displays Reading labels and Price tags Writing (Pen, Marker, Pencil) VDT screens



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Design Criteria: (Designed to Food Display Recommendations) Appearance of Space and Luminaires: The space needs to be aesthetically appealing and inviting to the customers therefore the luminaires can not be obtrusive and must be incorporated into the architecture. The accent luminaires are brought into the architecture by hiding them under the copper canopy along the perimeter of the space and are intermixed with the decorated hanging scaffolding in the center. The general ambient luminaire fixtures are high enough not to be obtrusive to the space. Color Appearance (and Color Contrast): Good color-rendering is important, with illuminances with a minimum of 50fc. Unusually fluorescent is recommended for fresh vegetables, fruits, and meats. In fluorescent lamps; good color-rendering of 3000-4100K are used for different fresh food displays. Other lamp sources such as metal halide, white high-pressure sodium, and halogen lamp types could be used. Daylight Integration: There is no daylight in the space. Direct Glare: A distraction due to direct glare might cause customers to avoid products and put an unattractive appearance on the products and make it unable to read product descriptions or prices. It is also important not provide direct glare in the customers faces as they circulate through the space. Consideration must be taken into account for direct glare surrounding the cashier stations. Light Distribution on Surfaces: Should be designed to attract customers to the displays and make them want to buy the products displayed. Light Distribution on Task Plane: It is important to have uniform light distribution on the room surfaces. Uniformity makes traveling the space easier well you glance at the displays. Shadows: It is important not to have shadows so that the aesthetics of the space are appealing to the customers and there is no creation of unappealing sales locations. Radiant Heat: Use moderate illuminances (50fc) as light temperatures could have a negative effects and cause discoloration in fresh meats. All fresh food should have their radiant heat should be minimized. If halogen lamps are used for accent lighting use lamps with dichroic cool beam reflector coatings to reduce emitted radiant heat.



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Design Criteria Continued: Horizontal Luminance: Assumed Illuminances for Typical Areas in Malls. Food Displays: 50fc Circulation and eating areas: 10 fc Cashier Areas: 30-50 fc Power Density Requirements:

ASHRAE/IESNA 90.1 1999 Power Allowance for a retail building: 1.9W/ft2 Area: 10,750 ft2

Existing Conditions Wattage Per Luminaire :

Luminaire Designation

Total # of luminaires

# of Lamps

Lamp Wattage

Total Watts

HCAP17 9 1 175 1575

HCAP17EM 7 1 175 1225

T1510 14 1 100 1400

T4B 89 2 39 6942

T16 125 1 60 7500

T9 10 1 50 500

T12 6 1 75 450

T14C 10 1 50 500

Total Existing Wattage: 20,092 W

Existing Power Density Conditions:

= 20,092W/10,750ft2 = 1.87W/ft2 = 1.87W/ft2 < 1.9W/ft2 = Passes ASHRAE 90.1



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Assumed Finishes & Material Characteristics: Finishes

Surface Material Reflectance Ceiling Paint (Gingery) 20%

Paint (Livable Green) 61%

Paint (Vast Sky) 56% Wall

Kilm Beige 60% Floor Decorated CMU 30%

*Paint brand used was Sherwin Williams* Assumed Furnishings The space is mostly furnished with displays for prepared foods. Most of the displays incorporate wood as outer surface finish. The room is full of neutral paint colors while also including brick, stone, and ceramic furnishings. The design incorporates windows into the upper part of the atrium into the design. The atrium also is furnished with vibrant color banners for the different seasons. A copper awning wraps around the perimeter of the space and overhangs into the circulation space; the awing helps lead into the different food stations.



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Existing System Performance & Critique:



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Existing Lighting System Main Offices: The main offices are designed with functionality and simplicity in mind. In most of the space the existing light source is 2’x 4’ fluorescent parabolic troffers placed in a 2’ 4’ ceiling grid. In the security room however the design makes use of recessed incandescent down lights. The store manager’s office also uses recessed compact fluorescent for accent lighting. Reflected Ceiling Plan for Main Office:



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Luminaire Schedule:

Luminaire



Total Watts Ballast

FBA

13 2' x 4' T-Grid Parabolic

Troffer 277 90 Electronic

FBAEM

2 2' x 4' T-Grid Parabolic

Troffer, w/ EM power source 277 90 Electronic

R13

5 Recessed Incandescent

Downlight 120 100 N/A

R22

2 26W Recessed Compact

Fluorescent Downlight 277 28 N/A

LAMPS


# of Lamps

per Luminaire Description

Ordering Code

(Sylvania unless

otherwise noted)

FBA 3 32W, T8, 3500

Fluorescent F032/835

FBAEM 3 32W, T8, 3500

Fluorescent F032/835

R13 1 100W, A19 100A21

R22 1 26W Quad, 3500K

Compact Fluorescent CF26DD/E/835

Existing Control Systems: The Main Offices consist of 3-way switching controls. With only the basic 3-way switching present there is not an adequate amount of control to meet ASHRAE 90.1 standards. ASHRAE 90.1 requires all buildings larger than 5000 sq. ft. to be controlled with an automatic control device to shut off building lighting in all spaces when not in use. I believe this space should be kept at the shutoff requirements because the office is primarily used only during typical daytime business hours while the majority of the store is used 24 hours a day.. There is also inadequate control systems considering the daylight integration on the perimeter of the



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Tasks for the space:

Paper reading VDT Use Writing Egress Meetings Waiting Area/Lobby to other office

Design Criteria Requirements: (Designed to Office Recommendations) Appearance of Space and luminaires Since this space occupies the managers of the store this space should be illuminated with importance and be visually appealing and welcoming. Color Appearance: The CRI should be at a minimum of 70 so that there is good color to perform the paper tasks and VDT tasks which are performed in this space. Since this space occupies the managers of the store this space should be illuminated with importance. The Wood furnishings in the space push the design towards the 3500K range for a CCT. Daylight Integration: Making use of the windows in the space and decreasing the emphasis on artificial lighting. The daylight should be able to supply a large percentage of the light during the day in a couple of the offices. Direct Glare: Direct glare should be avoided so that the occupants have optimal working conditions. Direct glare on a individual in the workspace can decrease a individuals efficiency. Light Distribution on Surfaces: Even Distribution is needed on the immediate workspace so that proper luminance ratios can be achieved. Even distributions will lead to higher worker efficiencies as they work amongst the immediate workspace. Light Distribution on Task Plane: A uniform distribution on the task plane will help with the efficiency on paper tasks performed the individuals. Uniform light distribution on task plan also is important in obtaining proper luminance ratios. Luminances of Room Surfaces: Recommended maximum luminances for task to background are 3 to 1, and task to field of view is 10:1.



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Reflected Glare: With VDT screens present reflected glare should be minimized, to keep reflected glare minimized the luminance ratio between the VDT screen and the field of view should be kept at recommended values. Source /Task/Eye Geometry: Proper placement of light sources and work stations should evaluated. Keeping VDT screens away from direct glare like for example a VDT screen and angled towards a window should be minimized. System Control and Flexibility: The ability to perform paper tasks and VDT tasks should be obtained with complete occupant comfort and with out having to change conditions. The lighting system also should integrate with occupant sensors and daylight sensors into the design. Horizontal Illuminance: The recommendation for the illuminance on the work plane is 30 fc. Vertical Illuminance: It is recommended to have a vertical illuminance of 5 fc. The presence of VDT screens in the space makes this value very important in illuminating the space appropriately. Power Density Requirements:

ASHRAE/IESNA 90.1 1999 Power Allowance for a office area: 1.3W/ft2 Area: 1356 ft2

Existing Conditions Watts:



# of Lamps

Lamp Wattage

Total Watts

FBA 13 3 32 1248

FBAEM 2 3 32 192

R13 5 1 100 500

R22 2 1 26 52

Total Existing Wattage: 1992W Existing Power Density Conditions:

= 1992W/1356ft2 = 1.46 W/ft2



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= 1.46 W/ft2 >1.3W/ft2 = This does not meet ASHRAE 90.1’s requirement.

Light Loss Factors:

RCR = ((2.5)(10)(80))/(320) = 6.25

BF: FBA = 0.90 R13 = 1.0 R22 = 1.0

LLD: FBA = 2710/2950 = 0.92 R13 = 1.0 R22 = 1548/1710 = 0.91

LDD:

FBA = 0.89, Category IV, Clean, 12 Month Cleaning Cycle R13 = 0.89, Category IV, Clean, 12 Month Cleaning Cycle R22 = 0.89, Category IV, Clean, 12 Month Cleaning Cycle

RSDD: Direct 10% Depreciation RCR = 6.25 RSDD = 0.97

AGI Conversion

(RSDD and LDD combined to place into AGI): FBA = 0.93 R13 = 0.92 R22 = 0.92


FBA = 0.72 R13 = 0.86 R22 = 0.78



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Surface Material Reflectance

Ceiling Acoustical Ceiling Tiles (www.armstrong.com)

85%

Wall Paint (Soft Tan) 62% Floor Carpet 20%

*Paint brand used was Sherwin Williams* Assumed Furnishings Inside this space there are oak tables, desks, and other office furniture.

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Existing System Performance & Critique: The illuminance levels are not far off from the desired levels for an office space, the values are within the 30% factored range. The illumination levels however are quite high for a lobby or corridor and that is one of the tasks in this space and do not accent the walls. The high illumination levels in the center of the space could create uncomfortable transitions between the offices. Average Illuminances: Work Plane: 61.94 fc Vertical Illuminances: West end: 25.25 fc South end: 26.76 fc Ceiling: 15.06 fc Work Plan Illuminance Plan:

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Existing 2nd floor Eating Area/Restaurant Lighting Conditions: The 2nd floor eating area consists of numerous downlight and pendant sources with uniform distribution throughout. The majority of lamps used in the space are MR16’s. The lamps alternate between the use of halogen and compact fluorescent lamps. There is also use of wall lamps which go up the perimeter of the space. In the bar area pendants are used to provide aesthetics and to provide task lighting in this part of the space. Reflected Ceiling Plan for 2nd floor Restaurant/Eating Area:



Bar Lounge

Open Dining Room to Kitchen

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Luminaire Schedule:

Luminaire



Total Watts Ballast

A

64 Reflect MR16 Downlight 120 50 N/A

E

13

8" Splay Lens Reflector Downlight with Dimming

Ballast 277 28 N/A

F

59 Linear Track Lighting 120 20 N/A

G

32 Mono Rail System 120 50 N/A

M

14 Forged Wall Lamp 120 50 N/A

R

12 Modulex Pinhole Downlight 120 50 N/A

T

18 Modulex Slotted Pinhole

Downlight 120 50 N/A

P4A

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2-26W Deep Bowl Shade Pendant with anodized

Charcoal finish 277 57 N/A

LAMPS


# of Lamps

per Luminaire Description

Ordering Code (Sylvania unless otherwise noted)

A 1 50W, MR16/NFL/25 Ardee

#DL58BG/A4331

E 1 26W Quad, 3500K


F 1 20W Compact Fluorescent 20W TL925-24V

G 1 50W MR16/NFL/25EXZ Prima #40-XX-

1705SV

M 1 50W Halogen JH Lighting #W505

R 1 50W MR16/NFL/25

T 1 50W , MR16/NFL/25EXZ Ardee AD AD35C-AB-

33-BK

P4A 2 26W Quad, 3500K




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Existing Control Systems: This system contains controls that allow dimming and 3 different mood settings for the restaurant décor. There are no occupancy sensors in this space. Tasks:

Intimate Dining Reading Paper (glossy & plain) Writing Watching Chef Displays Watching Television (maybe for specials occasions) Egress

Design Criteria Requirements: (Designed to Dining Specs) Appearance of Space Luminaires: It is important for the space to include luminaires that are function but that are not obtrusive to the architecture of the space. Color Appearance (and Color Contrast) The color appearance should be inviting individuals into the space while creating a relaxing atmosphere. The color rendering should include warm CCT temperatures to make the food attractive to the individuals eating in the space. Daylight Integration: Daylight is integrated into the space with the access of light from the windows in the space. In integrating daylight into the space one must be careful to not change the mood or color appearance of the space. But the daylight could be incorporated into the space and hopefully illuminating some of the artificial light produced during the day. Direct Glare: It is important to avoid glare so the occupants can eat in comfort. Direct glare should be avoided with luminaire choice and location as well as accounting for the daylight integration. Light Distribution on Surfaces: There shouldn’t be drastic differences in luminance values between immediate eating area and background.



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Design Criteria Requirements Continued: Points of Interest: There should be emphasis on desired highlighted areas. There should be points of emphasis where individual can be attracted to the restaurant, for example attention should be drawn to the open kitchen /cooking school so that individuals in the seating area can look at it as like a stage. Source/Task/Eye Geometry: Emphasis should draw attention to the location at the table where you will be eating from. But there is also shouldn’t be to large of a ration between the task and background. System Control & Flexibility: The restaurant/seating area is used for multiple functions and should be flexible in this aspect. There is cooking classes, formal parties, casual dining, and formal dining, and other functions and each of these functions might require different needs. Controls could be used to create the different desired scenes of the space. Power Density Requirements:

ASHRAE/IESNA 90.1 1999 Power Allowance for Dining Family: 1.9W/ft2 Area: 7000 ft2

Existing Conditions Watts:



# of Lamps

Lamp Wattage

Total Watts

A 64 1 50 3200

E 13 1 26 338

F 59 1 20 1180

G 32 1 50 1600

M 14 1 50 700

R 12 1 50 600

T 18 1 50 900

P4A 14 2 26 728



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Total Existing Wattage: 9246W Existing Power Density Conditions:

= 9,246W/7000ft2 = 1.32 W/ft2

= 1.32 W/ft2 < 1.9W/ft2 - This meets ASHRAE 90.1’s requirement.

I made the assumption of “Dining Family” so that I could obtain the highest maximum value for power allowance.(1.8 –Cafeteria, 1.5 –Bar Lounge/Leisure)

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Light Loss Factors: (Light loss factors by individual luminaires)

RCR = ((2.5)(10)(310))/(7000) = 1.10 BF

A = 1.0 E = 1.0 F = 1.0 G = 1.0 M = 1.0 R = 1.0 T = 1.0 P4A = 1.0

LLD

A = 1.0 E = 0.86 F = 0.86 G = 1.0 M = 1.0 R = 1.0 T = 1.0 P4A = 0.86

LDD:

A = 0.86, Category III, Clean, 12 Month Cleaning Cycle E = 0.86, Category III, Clean, 12 Month Cleaning Cycle F = 0.86, Category III, Clean, 12 Month Cleaning Cycle G = 0.86, Category III, Clean, 12 Month Cleaning Cycle M = 0.86, Category III, Clean, 12 Month Cleaning Cycle R = 0.86, Category III, Clean, 12 Month Cleaning Cycle T = 0.86, Category III, Clean, 12 Month Cleaning Cycle P4A = 0.86, Category III, Clean, 12 Month Cleaning Cycle

RSDD

Direct 10% Depreciation RCR = 1.10 RSDD = 0.98



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Light Loss Factors continued:

AGI Conversion (RSDD and LDD combined to place into AGI): AGI Conversion = 0.92 (All luminaires types have the same RSDD & LDD)


A = 0.84 E = 0.3 F = 0.73 G = 0.84 M = 0.84 R = 0.84 T = 0.84 P4A = 0.73


Surface Material Reflectance Ceiling Paint 86%

Paint (Livable Green) 61%

Paint (Vast Sky) 56% Wall

Paint (Kilm Beige) 60%

Floor Hard Wood 16% *Paint brand used was Sherwin Williams* Assumed Furnishings The space consists of mainly tables and chairs for quiet a dining area experience. The room is filled with neutral colors, hardwoods, and two brick fire places. In the area where the kitchen is open to the dining room there is stainless steel used for the cooking demonstration stations.



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Existing System Performance & Critique: The lighting system did meet the requirements for the dining space. The space is supposed to provide an intimate dining space for people to eat and relax but instead the dining area provides average illuminance levels (25.1 fc) of over twice the amount of the recommended value (5 to 10fc).the foot-candles than the recommended value. The system also did not provide any interesting décor which is something that should be incorporated into an intimate dining space.



BAR LOUNGE Work Plane Illuminances

Open Dining Room to Kitchen Work Plane Illuminances

Illuminance Isolines Key 50 fc 40 fc 30 fc 20 fc 10 fc

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Existing Lighting System for the Building Exterior and top level of Parking Structure: The parking lot is illuminated with Metal Halide luminaires mounted at heights of 30’ or 19’ poles. The poles are distributed throughout the parking and the perimeter of the lot. The façade has illumination on the clock tower and the glass façade on the market café entrance is illuminated at night from the inside. Site Plan – Electrical/Lighting Plan



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Luminaire Schedule:

Luminaire Luminaire

Designation Symbol Total # of luminaires Description

Mounting Height Voltage

HAI

(1) 1000W Metal Halide Luminaire w/vertical lamp type vs distribution and flat

glass lens. Provide with a 27' square straight steel Pole. 30' 480

HA4

(4) 1000W Metal Halide Luminaire w/vertical lamp type vs distribution and flat

glass lens. Provide with a 27' square straight steel Pole. 30' 480

HD1

(4) 400W Metal Halide Luminaire w/vertical lamp type vs distribution and flat glass lens.

Provide with a 16' square straight steel Pole. 19'

Multi-Tap/277

Luminaire Lamps Luminaire

Designation Brand

(Catalog #) Wattage Description

HAI LS1 Hilton II

1000W Pulse Start Metal

Halide

HA4 LS1 Hilton II


Halide

HD1 LS1 Hilton II


Halide



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Typical Luminaire Detail:



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Design Criteria for Parking Area: Appearance of Space & Luminaires: The parking lot, facade, and landscaped regions are the first and last impression each customer is left with when shopping at Wegmans. Wegmans feels it is important for this space to appear attractive and maintained; subsequently it should also be important to show it off at night. The store will be visible from Monument Drive and Direct Glare: Direct glare must be minimized for the safety of individuals operating motorized vehicles within the parking lot or adjacent roads. Light Distribution on Surfaces: It is important to maintain uniform distributions throughout the lot, which will help protect individuals from safety concerns. As a general rule the luminance ratios should not exceed 20:1. Light Pollution/Trespass: All upward flux emission should be minimized with the parking lot and street lighting systems. All parking lot and street lighting should have luminaires with full cutoff at the horizontal plane. All non-target illumination should also be minimized on architectural and sign lighting. The outdoor lighting systems must also be conscience of not allowing any potentially undesirable of amount light to the neighboring properties. Modeling of Faces or Objects: Safety is the number one factor for Wegmans in the design of the outside space. Helping with the sense of security it is important that faces, individuals, and other objects are properly lit so that each individual can clearly see their surroundings. Peripheral Detection: Suitable illuminance levels should be provided for individuals entering or exiting the building and individuals driving motorized vehicles to provide adequate light for awareness of their surroundings on the property. Points of Interest: The entrances should be the brightest part of the space leading customers into the building. Also signs and other special architectural features should be highlighted as appropriate.



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Design Criteria for Parking Area Continued: Shadows: Shadows will occur in general due to large objects or when illuminance is not even. Shadows could cause accidents by blacking out an area or due to the large difference in luminance ratios. Source/Eye/Task: It is important that individuals have safe driving conditions. Analyzing the parking lot for proper illuminance, luminance values and minimization of glare will help conclude whether individuals can drive safely through space. Horizontal Illuminance: Minimum horizontal illuminance of 5 fc is recommended. Generally the heavily travel egress path should have Vertical Illuminance: Minimum vertical illuminance of 2.5 fc is recommended. Power Allowance Requirements: As per ASHRAE 90.1 design regulations. Power Allowance: Building Entrance with Canopy: 3 W/ft2 Building Façade: 0.25 W/ft2 Parking Area: 0.2 W/ft2



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joseph lookup tech assignment # 1...power allowance for a retail building: 1.9w/ft2 area: 10,750 ft2...

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