Three different size for this family track light,including 20W, 45W and 50W, there are 3 options for 2 wires/3 wires/4 wires adaptor, made by die-cast aluminium ADC12, surface powder coated in white ,black or silver three different color; COB (Chip on Board) technology for maximum efficiency; no multiple shadows; energy-efficient LEDs with very good colour rendering; binning initial ≤ 3 MacAdam; available in the light colours 3000K, 4000K and 5000K; CRI ≥80/ ≥90; min. 80 % of the luminous flux after 50000 hours; BO 70 BASIC: high quality aluminium reflector with spherical facet finish; high-gloss anodised; precise radiation characteristic with four different beam angles; installed and exchanged without tools; adapter for toolless insertion or movement on a variety of 1 phase/ 3 phase power tracks; optional DALI, TRIAC.