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Good LED lighting lasts 25,000 to 50,000 burning hours. Heat and the quality of the driver determine how long that is in practice.

An LED produces light because electrons in a semiconductor release energy as light. White light is created with a blue chip and a phosphor layer.

In an edge-lit panel the LEDs sit in the edge and a light guide plate spreads the light. In a backlit panel the LEDs sit behind the diffuser.

LED stands for Light Emitting Diode: a semiconductor that emits light when current flows through it. LED is more energy-efficient, lasts longer and is more versatile than traditional lighting.

CRI (Ra) indicates how faithfully a light source renders colours, on a scale up to 100. The higher the CRI, the more true-to-life colours look.

Good LED sports pitch lighting delivers enough lux and even light, without glare or light spill. The EN 12193 standard gives guide values for each sport.

Lumens per watt (lm/W) indicates how much light a lamp gives per watt of electricity. The higher the number, the more energy-efficient the lighting.