From BavAuto:

An absolute must for the fashion conscious BMW enthusiast. This simple replacement bulb and socket assembly replaces the stock unit to give the vehicle's headlamp ring a clean, white 6500 Kelvin brilliance. The super L.E.D. bulb in this assembly upgrades the color from a typical incandescent yellow, to a color typical to H.I.D. bulbs, matching the factory H.I.D. headlamps.

Part Number: 19409

Description: Piaa Angel Eye Bulb Upgrade - Sold As A Pair

Price: $129.95