Great for Dawn to Dusk Cycles Use this automatic dual outlet timer for your lights and wave-making power heads.
18W Dual Actinic03 (420nm)/7100K (460nm) Powercompact bulb Half Actinic03 (420nm) and half 7100K (460nm) blue with square pin configuration. Approx. bulb dimensions: 10.5"x1.75"x1"
Bulb Replacement Guide