The location:
Biomass factory, Ruthin, UK
The application:
24 hour factory lighting
Lighting products used:
56 x LED SunFIRE™ 77W units from Low Energy Designs
Quick overview/quotes:
Clifford Jones Timber are at the forefront of the Biomass industry in the UK. When the company was building a new wood pelleting factoryin Ruthin they were keen to reduce operational costs (both powerconsumption and maintenance) as well as reduce their carbon footprint.The new factory has been specifically designed to use the waste biomassproducts from their saw mills to produce wood pellets for use indomestic heating systems as well as generate the heat required fortheir production. The new factory operates twenty-four hoursper day, seven days per week, so requires good quality lighting. Alighting system has been designed by Low Energy Designs Ltd, which hasenabled the company to reduce power usage without compromising onlighting quality. In fact the SunFIRE™ lighting units supplied have awavelength which closely replicates natural daylight. TheSunFIRE™ fittings were programmed so that the in-built controller andphotocell performed auto light levelling to increase power output asthe natural daylight decreased and to decrease the power output asnatural daylight increased. This eliminates the need for the lights tobe switched on and off and hence creating additional savings.
Resultant Energy Savings & Key Benefits:
The following table compares power consumption and operational costs of 56 x LED SunFIRE™ 77W units (7 LED strips per light) with 43 x 400W Metal Halide units. The installed system was designed to provide comparable or better light output and light distribution using SunFIRE™ units to replace Metal Halide units)
| COMPARISONS | 43 Metal Halide Units | 56 LED SunFIRE™ 7 | SAVINGS | | Total power consumption (kWh) per 24 hours | 509.80 kWh | 115.58 kWh | 394.22 kW | | Yearly operation - 24/7 for 50 weeks | 178,942.60 kWh | 40,569.98 kWh | 138,372.62 kWh | | Cost/ year based on 10p per kWh | £17,894.26 | £4,056.98 | £13,837.28 | | Cost/year for replacement bulbs | £1,596.16 | £0.00 | £1,596.16 | | Cost of servicing of lights | £1,100.00 | £0.00 | £1,100.00 | | CO2 Emission Savings /year (Kgs) | | | 55,349 Kg | | TOTAL COSTS | £20,590.42 | £4,056.98 | £16,533.44 |
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