
I used them to replace halogen bulbs (500 and 300w). Replacement bulbs are not rated for the same amount of light as a 500w or 300w halogen bulb BUT they are BRIGHT ENOUGH for my use. This is a very bright white light. The units I received were slightly longer than the original halogen bulbs, but all of my work lights could handle that extra length with no modifications required. They fit better than the original bulbs. Now I can use my work lights without them generating a lot of heat around the headlights like halogen lights. Also, I no longer feel guilty about using these bulbs because they don't use as much power as halogen bulbs.

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