Quote:
Originally Posted by X5SND
As for switching out the bulbs in pairs...it's good practice, but not really necessary for non-arc lamp (hid) burners since they don't really color shift over their lifespan.
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Although halogen bulbs don't color-shift over their lifespan, they tend to lose their luminance as it ages. If you just replaced one, you will notice how much brighter the new bulb is compared to the old one.