Overdriving lights.

[canadawest]

I was thinking last night, and came up with a question.

I am planning on upgrading to 2x250W MH lamps sometime in the new year. I will be keeping my Icecap 660, but reducing the number of lamps from 4 to 2 to make room for the MH lamps.

With that in mind, would it be possible to overdrive 2x48" Actinic VHO lamps using all the leads from the Icecap 660?

That way I could reduce the number of lamps to make room for the MH, without reducing (as much) the amount of light from the remaining VHO lamps.

Ideas???