I'm not a tech but have had to replace one lamp on my 47" Samsung (your TV's big brother

). Yes, its been worth it. And it will still be worth it the next time I have to do it.
Check the return policy where you're going to buy your lamp. That way, if it turns out to be something else you can return the lamp.
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If there are lawyers or politicians involved, logic may be a very poor tool for reaching a conclusion.