"PIAA" XTreme White Halogen Bulbs
 

The PIAA Xtreme White Series of 55 watt Halogen Bulbs, 4000K, available now thru Marken Performance, have a cool white light output that gives the driver better color recognition on depth perception and better contrast than stock halogen lamps. The blue top coat on this series of bulbs adds a slight blue tint to a lamp with no loss of performance. Heat Resistant Quartz Glass for Long Life. Aerospace Alloy Filaments for Durability.
These are extreme high quality bulbs!

PIAA Xtreme White Halogen 55 watt Bulbs

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Popular H11 size is part # 15211.
9005 size is part # 19615.