The bulb my tail light came with kinda sucked (actually the whole unit was a little sub par, plastic is half chrome, half black and the bulb didn't even fit in the socket right, had to switch out the socket, but for $15 guess that's what I get). The bulb was 5w/21w. I was going to order an led, but I found some incandescent bulbs that were 8w/27w, 10 bulbs for $5.91 shipped on eBay. Ordered this morning, waiting on a tracking update.