The TriBar has a replaceable H4 bulb. One element of the original bulb in mine burned out shortly after installation (might have been vibration from shipping/handling) and it was an easy replacement. If I had been forced to replace the whole lamp at almost $100.00, I would have been upset to say the least. The "blue dot" is at the center of the bulb where the three bars converge-not sure why they do that, but it looks nice. If you read my installation link, you will see that I also added the visor. The combination, I think, adds to the bike's appearance. The nice thing about the replacement bulb, as I noted before, is you can carry one in your saddlebag along with some of the other necessities, and you can experiment with other bulbs, like the Sylvania (Osram) Silver Star. Since I converted all other bulbs on the bike to LED's, the H4 is the only replacement bulb I carry.