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Don't forget to take into account the replacement costs of the original light bulbs, which would (normally) have a much shorter life than the LEDs. (Plus factor in a cost for your time, disruption etc for changing them, if you want, which may be way more important if the bulbs aren't expensive)
So for every LED (about 50,000 hrs? ) you should get through quite a few normal spots (2000 hrs for an Osram Halopolar ) 50W, 36 degree)
And of course there is the ever rising cost of electricity, which will help reduce the pay-back time.
Costing this kind of project can be a nightmare, if you add in factors for convenience etc. |
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