Simple Carpenter Bee Trap

My shop has been infested with carpenter bees this year and recently I learned how to make a simple trap. Carpenter bees, or wood bees, like to find little crevices and holes in which they nest. My trap is a simple 2x4 cut off with 1/2" holes drilled to a central chamber that leads to a glass jar. Hopefully the bees will be lured into the wood then crawl toward the light and become trapped. We shall see. I'll post an update in a few weeks whether the trap worked or not.