*High system efficacy, up to 102 lm/W.*3 in 1 Dimmable (1-10 V, PWM, or Resistor).*30 W main light with choice of 3000K, 4000K, or 5000K color temperature.*5 W sub light strip and optional color ring in red, green, blue, purple or yellow. *Installation accessory options: Standard surface mounted, or suspension option.*Aluminum outer ring and frosted reinforced glass to prevent direct light being too sharp.