After installing my new bulbs I noticed I was not able to see as well with the newer bulbs, even rated at 7500K. Same for the ones I put in HemiLoredo03 truck, so I did my research and this is what I have decided.

First the Kelvin scale is used to measure color temperature or hue (so more is NOT better or brighter). Midday sunshine is about 5000 Kelvin and about 6500 Kelvin is considered daylight white. The lower the temperature (which is strangely considered warmer) go towards yellow then red. The higher the temperature (which is strangely considered cooler) goes towards blue then violet. The Plasma Blue (7500k) are NOT HID bulbs (or even plasma for that matter) but simply blue tinted halogen bulbs. 7500 Kelvin is extremely blue (especially at night) and should only be used in daylight and is not suited (or legal) for night driving.


So in other words the bigger the number does not always mean brighter. The 5000k Polarg Blue tinted bulb(9006/HB4) is much brigher than my Nokya 7000K Blue tinted bulb(9007/HB5)

This message has been edited. Last edited by: CentralTexHemi,

Also learned alot about the difference between bright bulbs and light quality, there is a difference so if you want the best light quality FOG light out there get these (picture is not the exact 9006)
Made by Raybrig or go to
http://www.coolbulbs.com/raybrig.asp

Good info - thanks CTH

cool

That's why I always get the 4300K series when I equip a car or bike with HIDs. The whiter light simulates daylight and I can see better. Thanks for posting

They list 94-up Rams as taking a 9004 bulb. Is that right? They don't appear to even have that number.

quote:

Originally posted by Shifterbrains:
They list 94-up Rams as taking a 9004 bulb. Is that right? They don't appear to even have that number.

I found This bulb look up chart on that same site
Good Info CTH

i bought a set off " xenon “ bulbs off ebay for my skidoo mxz...they say they are 8500k..i think more like 5000 k myself but anyway...but the light is very white is a slight blue tint from a distance....but i do have to say on the snow they look way better and i can see further...this is not a claim im makein i seen it my self my buddy has got a near identicle skidoo and has factory halogen bulbs...his i believe and we went side by side and the difference was pretty amazing