Headlights, Looking for info Options

[Rand]

HID, xenon, halogen, projector beams, LED, etc., etc.

Please share any info you have, or links to useful websites you know of...

Looking for explanations of how the different types work.
Which kinds are the most efficient (brightest, least power consuming)?
Which kinds just need 12v, and which kinds need additional control boxes (or whatever you call them)?
Which kinds are the most compact?
What is the absolute smallest light you've seen (type and size) that I could get away with for low beam headlights?

I have read about LED headlights lights being introduced. Has anyone seen any yet?

There are some amazingly small driving lights these days. What are their characteristics? Narrower beam? Project farther? Are these too bright to have on in traffic?

Which types tend to be the cheapest, and most expensive? I've seen some prices on HIDs that are way out of my range.

Thanks gang.

[turboman808]

If you don't mind spending some money you may just want to go for hid lights. Gonna give you the best results. Just make sure you do it right so I don't get out of my car and threathen you bash them in with a hammer. The Project 914x looks like it will have a pretty slick setup, may want to take a look.

If you don't want to go that route you could try and go with something like the hella free form. They put out alot of light for what they are.

I have experiemented with alot of bulbs and honestly feel those super white type bulbs don't do a thing. Even at 130 watts they don't light as well as a regular 55 watt.

I do like selective yellow bulbs though. I use them for my brights and fogs. I just feel they light better.

Relays are always a good idea.