Blue bulbs are going to reduce your output.
ORIGINAL = Daniel Stern Lighting Consultancy and Supply

In fact, you get less usable light from such a bulb than from a regular clear bulb, and here's why: A blue filter removes nonblue components of the light passing through it. Halogen bulbs produce very little light in the blue frequency range. When you put a blue filter on the bulb or lamp, you are reducing the amount of usable light that gets from the glowing filament to the reflector, to the lens and from there to the road. If a bulb's sales material focuses on the color of the light rather than the amount of light, you should ask critical questions about the amount of light the bulb produces before choosing to use it.
Probably the best 9007 bulb you're going to find is the Philips X-treme Power +80. It puts out slightly more light than a regular bulb, and uses a smaller filament (closer to a point source) and more precise arrangement to improve the beam pattern and direct the light down the road. They're slightly whiter than regular bulbs, but nowhere close to HID color.

Even with high efficacy bulbs, you'll still be limited by the 9007 housing. The two filaments in the bulb interfere with the beam pattern, scattering the light and reducing the usable output. If you have the money, your best bet would be the Spyder Auto projectors. Even with halogen bulbs, the projectors put out a lot more usable light than the 9007 housing is capable of.