It is funny you ask this. It is getting harder and harder to buy these of the shelf. We are consdier canceling all exposure units but the LED versions because of this! Bulb that used to work do not work anymore.
If it helps:
Look for bulbs that have a wavelength peak of roughly 395 - 405
410 peak+ - will leave most emulsions slimy and underexposed
368 peak and below- will harden thinly coats screens but leave the print side slimy.
Aquarium bulbs are your best bet, but those are also going led.
We have strip conversions you can buy to turn your exposure unit to LED.