In addition to what others have said, the lack of heat means less fire danger.
There are a couple of downsides:
- While they are much more durable, individual bulbs can't be replaced.
- The colours are a bit more muted than incandescent bulbs.
I've been using them for 4 years now without any problems (still using my original sets of lights), and think that overall they're the best choice right now.
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