I bought five H51's and five H502's (mostly for gifts), and half of the lights would not turn on unless I removed the o-rings. I have not seen comments from anyone else experiencing this so I have to wonder if I just got very unlucky, or if there is a trick I am not aware of. I positioned the o-rings at the top of the threads -- just as they were positioned in the lights that worked -- and I tightened the end caps as tight as they could go, but no luck.
I really like the lights but it is frustrating that some work fine with an o-ring and others don't. I would appreciate any advice if someone else has experienced this and has a solution.
I really like the lights but it is frustrating that some work fine with an o-ring and others don't. I would appreciate any advice if someone else has experienced this and has a solution.