Electrical Lighting, how things change

Alan Collick Electrical Projects Engineer

Some images from Thorlux Lighting

The early daysThomas Edison patented the first reliable incandescent electric lamp in 1879.

Nothing much changed since then but they have be phased out for more energy efficient types.

Fluorescent TubesThese have developed over the years and have become more efficient and with better quality of light.

High MaintenanceWe replace approx 6000 lamps of all types per year across the sites at a cost of £15000 per year(estimate).

Environmental issuesFluorescent tubes are very environmentally unfriendly as they contain Mercury and other chemicals and have to be disposed of by a specialist company, this costs us approx £2500 per year.

And now the 21st CenturyIn the last few years LED lighting technology, reliability and most importantly costs have improved massively to make them a viable solution for many areas.

Office Lighting

LEDs – case study

*Based on 4000 burning hours per annum and 10 pence per kW/hr Electricity tariff

Saving£7,746.00

Payback 1.5 Yrs

Luminaire Qty Circuit Wattage

Total Circuit

Watts (kW)

Annual Power

Consumption (kW)

Running Cost per annum

Total Luminair

e Cost

Maintenance Costs

10 Year Life Cycle Cost

4x14W T5 36 62 2.2 8.92 £892.80 £3,600.00 £4,968.00 £17,496.00

28W LED 36 33 1.2 4.75 £475.00 £5,000.00 £0.00 £9,750.00

Changing to LED at ARUWe have changed some areas of Cambridge and Chelmsford

Helmore music recital area

MAB Corridors

Versatile control is available “Smart” control systems are available, such as in our office in Cambridge, which have in-built presence and light level sensors to dim or turn off lighting when not needed

Big project on the horizonPeter Taylor House

A likely investment of approx £150,000 to replace the lighting corridors and kitchens.

Any Questions

?