New DLP's: do they require bulb replacement?

[raginranger]

Hello,

This is a pretty noob question I suppose, but I couldn't find any information using the search button. The only things I saw were related to projectors, not DLP projection tv's. I was just wondering if the new DLP's, particuarly the slim Samsung's, required the bulb to be replaced every couple years or so like I have heard about. I also hear the term "LED DLP" thrown around but have no clue how that differs from a regular DLP. Any clarification on these two topics would be much appreciated, thank you.