250 watt HQI ballast.

[ron101]

ron101 wrote:
power lost to heat is amperage x current squared


That's a keen little factoid, I've never heard that before. Can you point me to any docs (online or otherwise) where I can do some further reading?? Thanks!!

Err... my bad. That should be Thermal Loss (Watts) = Current (Amps) squared x resistance (Ohms)

Fingers moving faster than the brain again.