I have a sony Sony A2000 series tv. About half the life of the bulb as hit, I host movie nights on weekends and the tv is on more than most RP tvs. I'd like to keep a spare on hand just in case the current one goes bad. Do the gas in the bulb ever go bad?? do you think its okay to have an extra one in hand for least a year before replacing??















I had to buy a 3rd bulb. I hadn't even opened the replacement bulb's packaging and it was sitting on a closet shelf for about two years before I had to use it.