LEDs really do make a bigger difference than people expect. @jade639 asking about the temp drop is smart because that heat adds up fast in a small space. The lower power draw and cooler bulbs just work better for any bench setup.
Hey, that's interesting... what kind of insulation did you go with in your garage? I'm curious how much the temp actually dropped, like did you measure it before and after? And how long did it take for the power bill to show a difference? I've been thinking about doing something similar but worried about the upfront cost.