Arcadia 2 x T8 UltraSeal Electronic IP67 Controllers, 18-40 Watt has waterproof lamp leads and controller body. Incorporates high frequency electronic ballast and independent lamp circuits. Electronic ballasts give reduced running costs and helps with a longer lamp life. Waterproof body enables controller to be fitted inside an aquarium hood. - Waterproof lamp leads and controller body - Incorporates high frequency electronic ballast - Electronic ballasts