Lights do deliver a lot of energy, even in the day and age of LED. I worked on machine vision projects back in the pre-LED days and the heat on anything used f

Lights do deliver a lot of energy, even in the day and age of LED. I worked on machine vision projects back in the pre-LED days and the heat on anything used for high-speed, especially with line scan cameras, where the photon density is higher, can be a real problem. I remember some fish inspection project that failed because the fish was cooked by the time it passed under the lights.