LVD Smart Dragon Series 40w Induction Light Square Replacement 5000k Lamp Only 5000k Color Temperature Lamp envelope is constructed of a high-temperature silicon glass, and solid amalgam channel in a sealed unit Dual external inductors at fixed point surrounding envelope UL\C-UL listed to US and Canadian safety standards for ambient operation from -40F to 122F (-40C to 50C) Annulus Smart Dragon Series Application Scope: suspended lamps