I have them in my SERG, Got them from Dave when they first came out in white, had the orange ones before. They run @ 100% intensity and blink off, versus OE which run @ 30% and blink to 100%. So they are major brighter running compared to any other bulb, led or incadascent. BUT they do not throw a light as far as your passing lamps do Fatboy. From any distance, day or night they show up remarkably brighter, but they are not a headlamp.
He also has them for the rear of regular (non SERG) type bikes in orange or red. When added to one of his 130+ led taillamp inserts you have major rear light.
I have in the last ten years tried lots of LED's and Dave @ Custom Dynamics is the best, his products are first quality and his warranty is unsurpassed. He is at all the major events and only to glad to stop and talk.