Features: 2 - T12 24" 20W Super Actinic Blue Fluorescent bulbs, 2 - T12 24" 20W Actinic Sun (50% Daylight & 50% Actinic Blue) Fluorescent bulbs, Moistureproof sockets, High quality electro-white reflector. Dimensions: L24.5"xW9"xH2.5"" INCLUDES INDEPENDENT CONTROLS FOR DAWN TO DUSK EFFECT