@meiya777
Try to find one in a large hardware store or buy one off ebay. I don’t really know which type exactly you should look out for, but mine is doing a good job @ 150 watts. It’s important to get one that has a hinge so you can tilt it vertically!
Mine looks a bit like this one here: Supplier of UVB 311nm handheld medical lamps for Psoriasis and Vitiligo
I mainly use it because it’s a lot more convenient and faster than the hot wrap. I have it right next to my desk & computer, where I usually do some exercises so I can ‘re-heat’ from time to time, too. It sits on a small chair, so all I have to do is turn around 90 degrees and flip a switch to turn it on … also keep a small white towel handy to cover your testicles, otherwise you might end up frying them (just kidding) :p
They’re also very good for (light) therapy in general, so you’re getting quite you money’s worth.