Lighting 101: Xenon Lighting Technology  Factory Xenon (HID) Arc-Capsule: The best quality xenon bulbs are typically manufactured by Philips in Germany. Xenon bulbs require a ballast in order to ignite and sustain light operation. A 35-watt xenon bulb will emit anywhere from 2700-3200 lumens. Xenon bulbs can consume over 120-watts during the first 10 seconds of startup and therefor, require a heavy-gauge relay/wiring harness. Xenon arc-capsules create light differently than halogen bulbs and should only be used in xenon-specific headlamp assemblies. Aftermarket Xenon "Retrofit" Kits: These kits are typically manufactured in Taiwan/China/Korea and are brought over to the US by the boat-load. Xenon arc-capsules are rebased into typical halogen bases (ie: H1, H3, H4, 9005, 9006). Problem is, manufacturers do not take into account that halogen and xenon bulb characteristics are different and therefor, cannot be interchangeable. These are flawed products, hence the reason we call them: JUNK. H4 Casper Shield: The item on the left is commonly known as a "casper shield." Why it was given this name, we do not know. Who is this Casper, is he a friendly ghost? No one knows. What we do know however, is that items like this are a "patch-fix" solution for consumers who have wasted money on an H4 retrofit kit. While this may help reduce glare (and obviously reduces total light output), it does not address the fact that xenon lamps produce light differently than a halogen bulb. You are better off buying some quality high-output halogen bulbs than wasting money and dealing with this garbage.