Deep UV-C 275nm uv led is a type specialized in Disinfection, deep UV-C 275nm uv led can also apply to microscope and Flame detection.
Maybe there are some people can't solder deep uvc 265 nm 275nm 280nm uv led with PCB, Glass Lens Packaging handling precautions as below, you can follow the step as below to do.
Glass Lens Packaging handling precautions
Deep 275 nm uv led