We have installed 5 x 160w low bays to replace 5 x 250w sodiums almost halving our power consumption and we wont have to touch them for 5 years , maintenance cost are reduced as an added bonus. We have angled the fittings to light up a dark area that would have remained dark with direct replacement fittings . At night they give out a better light against the sodiums yellow light . INUI ltd's advice was excellant ,and all there service was carried out in a very professional manner.