I don't think telling us which company the light comes from constitutes as promoting it. Maybe if you were to go on and on about how it's the best light ever, then maybe you could be called out for promoting. But telling us which light it is wouldn't be the same, and I think it's important to note which brand they are, for the same reason you mentioned, in case the lights didn't produce and the harvest sucks, you could save some people wasted effort. No one is going to say stop promoting if you provide a simple answer to a simple question