BIGmouthinDC, thanks for the link. Part of this is I am trying to figure out what is actually the part number. So if anyone can enlighten us as to what the numbers mean on the bulb, please step up. If you don't, we are all equally ignorant.
lavarenne, personally I do not believe we have a "litigation culture", and I do not think litigation is absurd. It is an equalizer for when big corporations abuse their position of trust, as we see in this case. However unfortunately two years or so ago, Republicans made class-action suits just about impossible to certify, in order to protect big corporations from us small fry. That doesn't stop us from Small Claims Court though, which would actually be far more expensive for Optoma, and far less money would go to lawyers if enough of us did it. Unfortunately though most of us have been trained to be frightened of that.
Big Lebowski, I don't know what you mean by "all are like the one in your picture". What we would like to do is figure out the numbers, so what are the numbers on your bulbs? Anyone who can check, is helping. Also, what I was saying above is that I suspect the envelope and reflector come as one unit, rather than separately.