The cost savings achieved by using LEDs can be considerable depending upon each individual requirement. Firstly there are the energy savings. For large organisations this can be considerable when the benefits are multiplied across many sites. Secondly the reduction in maintenance costs. Due to the long life of the LEDs the necessity for maintenance is drastically reduced. When used on sites where access for maintenance is relatively easy the savings are still considerable over the life of the product but the savings achievable can be considerably more when access requires road closure or out of hours working in public areas.

This cost saving example is from an actual site that has been illumnated with LEDs.

Flourescent Tubes Option

20no 6ft tubes and HPF gear trays
@ 80 watts = 1600 watts
x 12 hours per day = 19200 watts
x 365 days per annum
= 7008 kilowatts per annum
= 7008 kilowatt hours per annum
x £0.10p per kilowatt hour
= £700.80 energy cost per annum
Initial cost for fluorescent tubes and HPF Gear trays = £307

Cost over 5 years = £3811

LEDS

240no P511 LED modules @ 0.42 watts per module x 240 modules = 100.8 watts
x 1.2 converter loss = 120.96 watts
x 12 hours per day = 1451.52 watts per day
x 365 days per annum = 529.8 kilowatts per annum
= 529.8 kilowatt hours per annum
x £0.10p per kilowatt hour
= £52.98 energy cost per year

Initial costs for LEDS and converters = £870

Cost over 5 years = £1134.90

The benefits to the environment of these products are: -

• reduced energy consumption
• reduced hazardous substances
• less maintenace visits

RoHS - Restriction of the use of certain hazardous substances in electrical and electronic equipment

All the modules and control gear for modules comply with Directive 2002/95/EC. These products comply with the present requirements of the RoHS directives.