I put in GP Thunder 85k H11 bulbs. Much better for me. Not sure I'll do yellow. I also did my halos at 65k H8 but they look bad, currently waiting for some 85k H8 to arrive.

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2007 X5 4.8i | Grey Ex, Black Int | Premium - Sport - Tech Packages | Adaptive Headlights | Bluetooth | Park Assist/Back Up Camera and Monitor | Panoramic Roof | Xenon Headlights | Hill Descent Control | Stability Control |Adaptive Cruise Control | Rear Climate Package| Front\Rear Stabilizer Bars | Dual Exhaust System | Third Row Seating |

Mods: Sprint Booster V2, Black Matte Grilles, GP Thunder H8, H11 8500k Bulbs.