Focus on ; Lndoor lighting applications

Focus on indoor lighting applications

ln the world of LESs, we see many outdoor lighting applictions, But the conditions that LEDs experience indoors are not necessarily as predictable as one might expect, For instance, LED fixtures inside an indoor sports arena face different design criteria than LED luminaires that will illuminate a poultry farm, LAURA PETERS reports.

Hospital wards

Manchester, UK-based lighting company MHA Lighting Ltd, has worked with National Health Service (NHS) Trusts in the UK to combat hospital-acquired infection rates by urilizing sealed LED lighting units, MHA Linghting’s patented LED technology has been designed as a fully-sealed umit to stop dust, bacteria and deadly superbugs from gathering around warm light fittings, The long LED lifespan, estingated at 60,000 hr, eradicates the needs for routing lamp replacement, which stops harmful bacteria from being distrbuted into the air,

MHA manging director lom Harrison said, “Not only is the NHS saving money on operational costs for routine light maintenance,but our LEDs burn 20% of the energy of traditional fluorescents. The Carbon Reduction Commitment on large organizations such as the NHS means for every tonne of carbon saved, hospitals receive GBP12($19.5). Theis money can be directly ploughed back into front line patient services,”

MHA recently completed an installation in North Devon District Hospital in Barnstaple, which is part of the North Devon Healthcare Trust(NDHT). MHA replaced traditional 72W fluorescent lamps with 4000K Tilite 20W and 30W LED units in wards, corridors and recption areas.

Harrison said that MHA uses a reflector system where the LED light is shone sideways and reflected out of the fixture in a uniformly distrbuted manner, ln this way, he said, the photometric performance of traditional lamps can be achieved while provding the energy and maintenance savings of LED technologh.

MHA Lghting also developed a custom dimming solution for NDHT to allow lights to be dimmed down to 5%, lt was fundamental for the Trust to create a more pleasant and healing environment where patients and staff are in control of ward lighting levels during sleeping hours, for example.

The Trust reduced its energy usage from 127,910 kWh/yr to 33,044kWh/yr, With the integration of dimmers, overall carbon-emission reductions have exceeded 70%