I am looking for a pointer that can be turned on/off for a period of 30 mins.
Low power, short distance in daylight. Doe's such a pointer exhist?
Yeah, pretty much any 5mW pointer will do just fine for what you need. I've had my WL Core on for a couple hours at a time with no issue, and DPSS greens are fed with high power IR diodes, so they generate the most heat out of the cheap 5mW pointers.