The GLO T8, 20 W Single-Bulb Conventional Ballast Fluorescent Lighting System provides flexible lighting solutions for aquarium cabinets, multiple aquarium setups on store racking, shop set-ups and custom installations. This convenient, practical, well-equipped lighting system includes everything you need to make your installation simple and adaptable to most applications: – Easy-mount ballast housing – Ample wiring to allow rear cabinet mounting – Water resistant end caps, allowing placement of bulbs close to water surface – On/Off switch – Replaceable starter The lighting system is easy to install: simply mount the ballast and bulb clip holders to a solid surface and attach the water resistant bulb end caps to the bulb and you are ready to light up your aquarium installation. Bulb size: 61 cm (24 in) 30w Bulb GLO Conventional Fluorescent Ballast and End Caps is ideal for illuminating aquariums, terrarium and aviaries. Easy and flexible installation. Clips and mounting bracket are provided. 40w Bulb GLO Conventional Ballast single T8 40W Lighting Systems come fully assmebled, complete with remote mount conventional ballast, on/off switch, bulb mounting clips and water resistant end caps for maximum flexibility in meeting most aquatic and other lighting installations. These reliable lighting systems will deliver maximum light emmissions when combined with GLO T8/10/12 reflectors.