Generic UV Bulb Sold as Replacement for Trojan UV F4 Plus - Compatible Generic High Output Replacement Lamp TRI-20 It allows higher UV wavelength

It allows higher UV wavelength to pass through it and is a generic replacement for American Ultraviolet printer

Aluminum Reflector Set for IST Part # T-770-K2H UV Curing Lamp Bulb

Dichroic Reflector Set for UVT Part # U1003392412 UV Curing Lamp Bulb

which is why a quartz plate is a better UV replacement curing lamp option

A note on spare bulbs:

Generic UV Bulb Sold as Replacement for Trojan UV F4 Plus - Compatible Generic High Output Replacement Lamp TRI-20 It allows higher UV wavelength100% Guaranteed Generic Replacement UV Bulb 4 Pins with Barriers on a Single end 103 Watts 38. 81 Inch Length Lamp Worry Free Performance for 1 Year The Trojan UV F4 Plus Compatible Generic High Output Replacement Lamp 100% guaranteed generic replacement UV bulb that has 4 pins with barriers on a single end. The 103 Watts germicidal replacement lamp has a lamp length of 38. 81 Inch and gives you a worry free performance for one year. The four pin with