Angular Nitro Square surface-mounted LED downlight for warm white interior lighting The Nitro Square LED ceiling light is a functional downlight for direct general and task lighting indoors. Nitro Square is made of metal and has a cuboid shape. The warm white LED light source is recessed in the housing so that there is no glare away from the directly illuminated area - good colour rendering: CRI 90 - minimised glare: UGR < 19