The BUG Rating system, developed by the Illuminating Engineering Society (IES) and the International Dark Sky Association, is used to rank lighting products according to their ability to reduce backlighting, light emitted upwards (Uplight) and glare (Glare). This means that when the three values refer to the factors mentioned abovere ferring are within the optimal range, the product minimises direct and diffuse light emission upwards and backwards, helping to limit light pollution and improve the quality of the night environment.
