A number of places have LED 1157 drop in replacement bulbs. I have some from a store that sells accessories for ATV and in the current Riderwearhouse they have a 32 LED one that I will order next week. That said however, a dim light can be caused by resistance in either the feed circuit or ground circuit. Be sure the connections are not corroded in both circuits or at the bulb base. Seems like it is only a 5 Watt bulb for running light so it won't be real bright by comparasion to the stop light bulb, think it is 25 or so. I'm not sure the spinners are legal in every state unless they stop and glow steady. Kissan makes a brighter bulb and adapter that flashes the bulb and then turns in to steady on brake application. I had one but the circuit board apparently died prematurely and I've not replaced it yet. Going to try the big LED as the vibration doesn't kill them. Max

http://www.customdynamics.com/motorcycle_led_bulbs.htm

I don't know much about this company but these LED clusters by Radiantz might be worth a look. I plan on getting the 1.85"cluster soon. The 1157 version is a direct replacement for our tailight bulb.