Technical data: 1) luminance (Lux): 180, 000 (double)/ 90, 000(single) 2) Color temperature (k): 4500+500 3) Diameter of spot (mm): 150 - 300 4) Depth of illuminance (mm): 500 5) Power voltage: 220V / 50Hz 6) Input power (W): 660 7) Power of bulb (W): 24V, 150/150 8) Main lamp and the supplementary lamp automatic switch: 1/2sec. 7) Normal height of installation (mm): 3, 000