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Problems associated with White H7 Xenon HID Light Bulbs

13715 Views 14 Replies 12 Participants Last post by  English
I recently purchased a set of two White H7 Xenon HID Light Bulbs to replace the light bulbs that came with my 2004 treg. I didn't know how to install them myself and the Volkswagen dealership said they would do it for $30. When I took them in the mechanic said that they might melt the light housing and then I would have to replace the whole headlight unit!!!! The specs for the light bulb are Hyper White, 5000K Color Temperature and the Type/Volt/Watt:H7, 12V, 100W. Before I go installing them and possible damaging my vehicle, I was wondering if anyone else had installed bulbs such as these and had any problem with melting the housing or frying the electronic due to the hight wattage and voltage (both are double what the factory bulbs are).
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You need to find a set of 55W H7's with a 5000k-6000k rating. These will give you a nice cool white light with just a small touch of cool blue, this is the closest thing to a true HID system that will work with a non-balasted halogen system. I have a set of Luminics H7 6000k's in my 2009 Touareg and they work great and have had no problems, they have been installed for 4 months and about 5000 miles. I am actually an engineer for a plastics company so I have a little bit of knowledge about plastic. A 100w bulb will most likely not melt the headlight housing but it WILL definetely melt your wiring harness and could cause major electrical problems. Most automotive headlight housing are injection molded out of polycarbonate (lexan), Polycarbonate has a very high heat deflection temp and an even higher melting point. It has a heat deflection temp of 145c/295f, a glass transition temp of 150c/302f and a melt temp of 514f/267c, a standard 55w halogen bulb can reach 600-800 degrees f and the range for a 100w halogen bulb can range from about 700-950 degrees f with that number being cut nearly in half just one inch or so away from the actual bulb surface. Furthermore the vacum metalized reflective chrome plating on the inside of the housing keeps heat away from the plastic, it reflects heat much in the same way it reflects light. So as you can see if you do the math neither one is going to melt a polycarbonate housing, but it will mess up your wiring.
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