I don't do new homes for GCs, Russ, but my understanding of it is that you work up your bid as usual, then add $5,000.00 for the lighting allowance. I suspect that they would have to pick fixtures from a catalog you provide so you'd have your usual markup/profit. If they go over $5,000.00, they pay more. I don't know if there's a rebate for going under the allowance.

Dave