My Raytek MiniTemp laser infrared thermometer just showed up UPS. This thing is my favorite new toy. Bad ass! Works like a champ, just point and shoot and it's deadly accurate.
Check out Jorge using one on YouTube: Jorge Cervantes: Heat Problems
p.s. - I guess we can't link or embed YouTube clips on the Farm?
i originally got one for my grow. by monitoring leaf surface temps as opposed to just air temp, ya can tell if your plants are respiring. i also use it to check the grill temp, check for air leaks around the house and also better than a thermometer to check for fever.
got one at harbor freight and tool for under $20 and it's one of my favorite toys! you can set it to freeze/store the max temp so i just move it around all the tops you can find out the max temp any plant under your light is feeling and adjust accordingly.
^^^^^+1 these things are great. You can also find them at cooking stores as they are used in food service alot. Many people are quite surprised to find out that even though the ambiant temps. in your room may be 75 your tops nearest the light could easily be 85 or more.