One is a ceiling-recessed luminaire with precise beam angles for general and accent lighting. It is the first range of downlights to use Lightcore, an optic micro-reflector developed by O/M and Bartenbach. One offers a defined beam with no light spill and excellent glare control. Using one of the best LEDs on the market, One provides great comfort and colour rendition, with a CRI of over 90. The luminaire is available in three different sizes and three beam angles.