Indirect lighting, of course, would be ideal. What sets are you considering ??? Some models have non-glare screens.
I am in the market for a 50" Plasma but when viewing them in some stores I notice an unacceptable amount of glare & reflection due to the store lighting. In other stores who have darkened viewing areas there is no problem. What can I expect when I bring a TV home into a room <say> illuminated by normal tabel lamps or a bright room from windows?