No, the ballast has to be matched to the lamp. 250 watt ballast, 250 watt lamp. Also be sure to match the lamp type to the proper ballast even though the wattage is the same. HPS ballast to HPS lamp, Metal halide ballast to metal halide lamp and mercury vapour lamp to mercury vapour ballast.
No ballast must match lamp
No,you cant. you can run metal halide bulbs in hps but not hps in metal halide. they have to be same wattage. i.e.- 250 halide in 250 watt hps ballast..
A 250 watt light bulb takes 250 watts of power. The energy it uses (that you pay for) is measured in watt-hours or kilowatt-hours. A 250-watt bulb running for 4 hours uses 1 kilowatt-hour.
NOT PROPERLY Although it may light, it will burn out pre-maturely due to the higher current flow. A ballast and its lamp must always be a proper match in any HID (high intensity discharge) application. The 400 watt rating of your ballast is NOT a maximum rating. It is 400 and only 400.
I would wire them together in a parellel circut. all the lights together, white to white black to black then put your ballast to em. it works like that with my 400 watt mh/hps ballast and 2 250 watt hps bulbs. run 2 hps bulbs with 2 mh bulbs if you can, you get better results.
If the fitting says 150w that is the most powerful bulb you can use without it overheating. 250w is too much.
Incandescents produce about 10 lumens per watt.
no the fixture has to be rated for the size and type of the bulb. most fixtures are not rated for 250W
about 28,000, i think.