Different wattage metal halide lamps

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Humblefish

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Long story short: I meant to pickup 2-250w Radium lamps, but accidentally picked up 1-250w & 1-400w. (The LFS I bought them from is 4-5 hrs away - long story.)

The good news is I have two Coralvue "Select-a-watt" MH ballasts, so I can drive both 250w & 400w lamps. But I'm sure that's gonna look weird. I thought about just underdriving the 400w lamp using 250w ballast setting, but I'm reading that's gonna make the lamp very blue.

Thoughts? Suggestions? What can I do?
 

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