|
Carlso, by connecting both ballasts to the same bulb, you are not just trying to drive the bulb. The ballasts are also connected together and the ballasts are sending current, or trying to, to each other. You're "bucking" power and depending on the protection circuitry in each ballast (and going from the pcitures, it probably isnt much) there is a good chance that you will literally burn out both ballasts and maybe take the bulb with it.
You are on track about the Magnetic HQI ballasts. The magnetic HQI ballasts will generally drive the 250 watt double ended bulbs with somewhere between 250 and 350 watts. + 300 watts give or take a bit is probably typical for a lot of DE bulbs. It depends on the bulb. Since these ballasts (M80 for 250 watt, M81 for 150 watt) are what the vast majority of DE bulbs are spec'd to be driven with, they do not technically overdrive the bulbs.
|