I would like to suggest another program - add the cost of wholesale purchase of the lamps, amortized over the expected life span of the lamp, to the utility bill. With any luck the savings would result in no net increase in the bill. With a deal like that I expect many would, as would I, go 100% LED, even to the extent of replacing fixtures. This might even expand into replacement of water closets, change out of water heaters to high efficiency tank-less, and even window replacement. If the new law requiring energy upgrade of houses before sale is passed, such a program would be very popular among seniors, and the city might even gain revenue by selling these loans on the secondary market, since they are almost loss proof.
Walter E. Wallis, P.E.