I know there are a few forum members that have them and as far as I know they work fine. I don't disagree that there some out there with no problems.
Here's my history with them..
About 10 years ago I tired to get three to work, they just kept shutting off by themselves on a ride. After the third one I got a refund instead.
This week I received a new one in a box from ebay. I thought the price was right. I have the correct 13.2 volt Nightrider battery in perfect condition to run this light. It runs my Nightrider HID perfectly. It still puts out 13.2 volts with the taillight on. It's about 14 volts with no load.
As soon as I plug in the light it comes on. It will not flash or shut off with the switch. I took it apart and the switch is fine. It is not as bright as my Cateye TL-LD 1000 from any angle side, 45 degrees, straight on, etc. the Cateye beats it by a huge margin from all angles. The Cateye beats it from straight on, but by a smaler margin.
This "New" model has a clear plastic housing, the older ones had a red plastic housing.
That's four failures for me. I know there is one on the forums that does not flash that may or not be a problem with the light. One forum member told me he sent his back once to be repaired, I think it's working fine now. That's five or maybe six that had problems.. So...........
Which model do you have? Red Or clear?
If it's older is the 12v or the 6V ? (The plugs were different, I don't know if the lights were different)
About how old is it ?
Any problems of any kind?
Is it just me?