Brilliant!
I've wanted to put LEDs in my motorbike headlights for a while but the cost has been somewhat prohibitive and the power packs were too large. These fit with a little modification to the dust covers that bikes have on the back of the mounting, it has to be cut to a larger diameter opening to allow the fan and heatsink to fit through but this is easy to do. An added bonus, is that the fan helps to take condensation out of the headlamp fitting. The only annoying thing is that the pos / neg markings on the plug are very hard to see and this can be tricky when you're groping around in the nose of a bike's fairing but this was made easier by my putting a blob of red paint on the pos. side.
The best thing is that they are AT LEAST 50% BRIGHTER than standard bulbs and for a biker this can be a matter of life or death, so, a good buy then.
Verified purchase: YesCondition: New