View Full Version : High Intensity Discharge Lamp

05-29-2013, 06:17 PM
I have installed HID lights in my Fiat 500 Sport. I went with the 5000K bulbs since it output more lumens and the color was white. Although it looks great, there seems to be a shadow present.


I believe the cause is the white tube on the side of the glass bulb. as seen in the next photo.


Has anyone else noticed this on their HID lights?

05-30-2013, 12:13 PM
Yes, happened to me too. Take the bulb(s) back out carefully and first check to see if the insulated wire (white) was bent during install. This happened to me. If so carefully bend back with a soft rag and don't touch the glass part of the bulb. Also, if you installed the buld upside down or slightly sideways it will cause the same shadow. My kit came with a bulb that didn't have the exact same side tabs as the stock bulb, so it was easy to put it in wrong.

Good luck,

05-30-2013, 03:13 PM
.... I went with the 5000K bulbs since it output more lumens and the color was white...

Seems like this whole Kelvin thing really throws people off. Kelvin in the context of light is color. Lumens are output.

3000K = Yellow
4300K = sunlight
5000K = blue-tint white
10000K = Blue

HID's, by nature of their design, out put the most Lumens at approximately 4300K color temp. It's a bell curve downward in Lumen output the further you stray from that mean. FYI, every single OEM HID uses 4300K color, despite what and chromatic aberration and fringe effects the optics may have.


The shadows in your lights may be caused by the electrode filament being upside down.