I will tell you what I have been using for the last three years. It is a little safety light that you plug on any outlet, it is green in color and it's output is a mere 4 watts although the light is very bright in the darkroom. When I develop by inspection I use a pedal to turn it on and inspect for one or two seconds, at 2 or 3 feet first but sometimes go up to 6 inches if I really need to for those extra stout negatives for Azo printing.
I got a twin pack at Kmart for about 5 dollars. I never felt the need for a better piece of equipment all thanks to Martha Stewart.