Coralife 50/50 Flourescent 6,000K True Actinic 03 T8Coralife 50 50 T8 Fluorescent Lamps feature two types of light in one! Each lamp provides a mixture of 50% 10,000K natural daylight and 50% True Actinic Blue phosphors. This full spectrum lamp provides tank inhabitants with the proper light required for essential biochemical reactions. 50% 10,000K Daylight and 50% True Actinic Bluelight Casts sparkling white rays and softer shades of blue light Fits all compatible electronic ballasts Suitable for