The 12 Watt LED Down Light has been designed to retrofit existing ceiling down light installations and new fixtures. Replacing incandescent and halogen lights with energy efficient LED can cut energy consumption by 66%. Solid state LED lights last longer, reducing maintenance and replacement costs. No mercury, no UV, no noise, no flickering. Tested to CE, UL and FCC standards. No ballast required, 24VDC Exterior SMPS adaptor included.