Hey man, I was just looking at the 12V HID lights on Ebay from china in the 55W category (4500+ lumens each) for around $50 (total + shipping) for a kit of 2 bulbs + 2 ballasts. The thing is that they are now available as low as 3000K HID and all the way up to 12,000K+. These kits are not really high powered but are easy to replace bulbs (around $10 a pair), are 12v (less heat and less noise from the ballasts) and they can be spaced out for best lighting.
I just ordered 1 kit (110w total power) with 3000K bulbs and 2 extra kits (1 kit to replace the 4300K lights I have now and one more for spare parts). Just my 2 cents instead of bigger lights that emit sound and more heat.
Edit: Forgot to mention that Xenon bulbs are full spectrum lights.