Case Study
Shopping Centre – Derby


The client was looking to replace all car park and back of house utility lighting. The aim was to upgrade the lighting levels whilst reducing energy consumption.


The original installation was a mixture of 58W and 70W fluorescent fittings.


We supplied 3,200 non-corrosive fittings complete with DALI dimming drivers and integral wireless controls. The controls were configured to reduce the consumption upon non-occupancy

30% of the fittings were supplied complete with integral self-test emergency to meet current regulations.


Original Installation

Luminaire type Circuit Power per Luminaire QTY installed Total Consumption
58W T8 IP65 Batten 67W 1700 113.9 kWh
58W T8 IP65 Batten 78W 1500 117.0 kWh
Total 230.9 kWh

New Installation

Luminaire type Circuit Power per Luminaire QTY installed Total Consumption
27W LED IP65 Batten 29W 1700 49.3 kWh
31W LED IP65 Batten 33W 1500 49.5 kWh
Total 98.8 kWh

Energy Saving

without Control Factor
132.1 kWh
(57% reduction in power consumption)

with Control Factor (assuming fittings run at low consumption for 40% of operating hours)
171.62 kWh (74% reduction in power consumption)


Goods for phase one were supplied by the end of May 2017 against a delivery schedule supplied by the client.


The value of the goods supplied was £ 267,288.

We are however unable to provide payback details as we do not know the installation cost for the project or the energy costs for the site.  Our remit was to reduce energy consumption only.



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