LED vs regular Christmas lights?

I know that the advantages of LED vs regular Christmas lights (less energy, last longer, cooler), but at $10 vs $3 / strand, it makes it hard to make the jump, since I would have to buy like 4-5 strands for the tree and another 3-4 for outside and then the icicle lights too. How long would it take me (figure 5... show more I know that the advantages of LED vs regular Christmas lights (less energy, last longer, cooler), but at $10 vs $3 / strand, it makes it hard to make the jump, since I would have to buy like 4-5 strands for the tree and another 3-4 for outside and then the icicle lights too.

How long would it take me (figure 5 hrs nightly for 30 day) to be cost effective for the LED vs the small lights, not the screw ins?
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