Digital ballast. 1000W, 600W, 500W and 400W MH/HPS compatible , 120V/240Vconvertable UL,CUL, CE,TUV, listed No fans ... , ROSH,CE,TUV. Suitable Bulbs250W, 400W, 600W, 1000W HPS/MH bulb of America and Europe standard Electrical Performance of 250W ModelRatingVoltage(V)InputPower(W)Input ... 120/2402752.30≥0.98≤10%100~240250 Dimension of 250W: L: 78 in(308mm) W: 24.60 in(97mm) H ...