Originally Posted by chewybrian

thank you for the info.

You sparked a couple more questions. The drop ins are rated to run 3-18 volts. Does this imply that they already have a driver? Would it be harmful to have a driver in the drop in and another buck puck? It would seem, to my uninformed mind, like having 2 fuses on the same circuit--no problem, right? Also, what is heat sinking and why should I be doing it?

thanks again; I am sure these are ez questions to all you veteran electricians.