It’s a fair question. Many people make it a point to not get a spare lamp because they’re afraid that the one that isn’t being used could go bad. It’s something which takes place with ink cartridges for printers but lamps are a lot different since there isn’t anything which can dry up.
Hometheatermag.com has a great answer:
I don’t think there’s any downside to getting a spare lamp before you need it. I can’t imagine they “go bad” or anything like that. I suppose that lamps do go out of production at some point, but I don’t think it happens very often or quickly. If you can afford to spend $800 now as insurance against the moment when the current lamp dies—which will most likely be in the middle of a big movie or sports party—then go for it.
If you’ve never been to their site, it’s a must read for anyone into gadgets or looking to increase their knowledge in televisions, home theaters and other audio and video gear.
Also, if you need to purchase a replacement TV lamp or projector lamp – we’ve got you covered.
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