I using Philips Halogen GT200. I think that's the brightest for Halogen, but life like shit
Few month need replacing

I only buy when on offer.

I tried experiment on my wife car, using lesser bulbs with LED spotlight (CWL K30). I think this is the bestest combo.
Later I also wanna put spotlight on my car. It's is small, I also smoke it darker, so I hope JPJ no saman.