the 315 watt cmh agro bulb from phillips lasts over 3 years, 20,000hours before bulb change. wright now a bulb is around $90.00, but with it lasting 3 plus years its cheap in comparison to the many hps bulbs you would need in 3 years.. also the 315 watt bulb can yield you around 500 grams,,try getting that gpw with a hps...cmh=way better
From where if you don't mind me asking. I paid $364.43 after everything and that was the best deal I could find on phantoms. If I can get it cheaper on the next one. That 25 dol can go to somewhere else