I LOVE my Dinotte 600L. I dropped it recently which broke the LED lens cover. I sent it back to Dinotte for a "minor" repair that would have cost about $20. I decided to buy a 140L taillight, to supplement my existing Planet Bike Super Flash taillights, so they did the repair for free. The light came back good as new. (Note: The light is not fragile - I've dropped it several times over the last 3 years with no problems. This is the first time it needed repair)

The higher power Dinotte lights (600, 800, and presumably the 1200 - Check with Dinotte to be sure) have two buttons to control the light level. The left button kicks you into HIGH Power (100%) while the right button cycles you through 100%, 50%, and 25% power. I currently run my 600 at 50% most of the time and kick it into HIGH when doing 20mph descents in areas with no street lights. An 800 or 1200 would be nice but I can see well enough to be safe.

High quality, durable, repairable at a reasonable price, engineered and built in the US to boot - what more could you ask for.