LED's will pay for themselves where it is expensive to change the lamps. There are a number of considerations, if you are using incandescent (regular lamps) and like the color of the light, then buy warm white lamps. Virtually all LED lamps are made in China, and I have a list of good Chinese sources, usually at about 1/3rd the US retail cost, you can pm me and let me know a bit more about what you need in the way of lamps, & I will try to help you choose a supplier.
Led's are very directional, but many lamps are made with precise flood angles. If you buy led's the SMD types are newer and brighter per watt. Cree makes the most powerful emitters, and have reached 200 lumens per watt - not on the market yet but coming soon. 100 lumens per watt is common these days.
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