led lighting vs hps - all you need to know

Dialight LED LightingTechnology Comparison: High Pressure Sodium

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DialightTechnology Comparison

LED High Pressure Sodium

Typical makeup of bulb material

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DialightPower Consumption / Dimmability

Light Source Watts Dimmability Dimming Limit

High Pressure Sodium 100 – 500 Requires special ballast 50%

LED 43 – 170 Yes 10%

Energy savings and CO2 emissions reductionReplace 400W conventional light source with 150W LED High Bay for immediate energy savings of 60%, even more when you use dimming and proximity sensors.

On average 100 Dialight DuroSite LED High Bays can reduce CO2 emissions by 125 tons per annum (12/7 operation).

DimmingDimming options for LEDs include STEP dimming for specified light level percentages or variable dimming for custom light output levels determined by the installer/customer. A special ballast is required to dim mercury vapor lamps.

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DialightLumen Per Watt Efficiency

Light Source Lumens/watt

High Pressure Sodium 80-140

LED 114-160

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DialightLifetime / Lumen Maintenance

Light Source Lifetime in Hours (x1000)

High Pressure Sodium 10-24

LED 100+

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DialightColor Quality

Light Source CRI

Mercury Vapor 20-30

LED 70-90

High Pressure Sodium

LED

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DialightComparing Color Quality – LED vs. HPS

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DialightTemperature Ratings

Light Source T Rating

Mercury Vapor T2A – T3A

LED T4A – T6

Ratings given at 40° C ambient temperature

HPS LED

Temperature RatingsHeat producing equipment is marked with a Temperature Code, to indicate the maximum surface temperature.

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DialightMercury Content

Light Source Mercury Content

HPS ~ 6 mg/100W

LED 0

DisposalThe Resource Conservation and Recovery Act (RCRA) and the Universal Waste Rule (UWR) regulate the disposal of lamps containing mercury. LEDs themselves contain no mercury or harmful materials, which require special handling or unique recycling.

Philips 1000W Mercury Content: 44 mg

GE 400WMercury Content: 30 mg

LEDMercury Content: 0 mg

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DialightInstant On/Off

Light Source Warm up Time (minutes)

Restrike Time (minutes)

High Pressure Sodium 2 – 15 4 – 5

LED Instant Instant

400W HPS Lamp Startup Color Shift

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DialightOperating Temperatures

Light Source Operating Temperature (°C)

HPS -30° to 65°

LED -55° to 70°