These surface mount underwater lights are made from non-corrosive 316 grade stainless steel and have an IP68 totally waterproof rating. In addition to 10 x very bright 3 watt LED’s these underwater lights have a secondary optical lens to further enhance their brightness. The 10 x 3 watt Samsung LED’s have a 50,000 hour life and an effective Lumen rating of up to 1130 lumen (equivalent to a 150 watt standard bulb) for the white light, 245 Lumen for the blue and 590 Lumen for the green colour light. The lights are supplied with a wiring gland with 1.5 metres of wiring, driver unit and S/S fastening screws. 3 light output colours available - white, blue or green. Suitable for both 12 volt and 24 volt systems. MUST be used underwater as these bright lights are water cooled. Light size : 138mm x 68mm