Better to overdrive 400W HPS or under drive a 600W

[hank123]

Better to over drive 400W HPS or undrive a 600W HPS?

Warmer temps coming, and cost rates to double, time to cut down the heat.

I have a 1000W digital ballast.
At 50 percent (500 watts) is it better to overdrive a 400W HPS or under drive a 600W HPS.
Bulb is in a vented hood.

Thanks!

 

[Hosebomber]

I'm pretty sure you are required to still use a 1000 watt bulb. Check with the manufacturer of your ballast, but I'm 99% sure.

 

[Fuzzy Duck]

I'm pretty sure if you placed a smaller wattage bulb into a larger wattage ballast you would blow it pretty quickly...



But Digital Dimmable Ballast are available, i've been using a 400w dimmable ballast by lumatek recently even has a super lumen function