It was clear that 2 smaller lights per bench are required. So the cost per bench would be about
2 x $6 for 30W LED
$2 for electrical cord cut up and connected to the LEDs
$1 for misc heat sink compound and screw nails.
$2 electrical switch
estimated cost would $10 per bench.
This solution is NOT dimmable.
still seems like the LEDs I proposed are less expensive. but the difference is not much, and there’s a total of 12? 14? benches. for a $2 diff we’re talking less than $50 difference. Not worth my time to argue it. get the lights you want