Blacklight (BL) lamps are made with a special glass that filters out most visible light. Blacklights instead emit a specific type of ultraviolet light called UVA. Blacklights are good for making certain substances glow that would normally be invisible.
Blacklight Blue (BLB) lamps are designed with a special deep-blue glass that does a better job of filtering out visible light than regular blacklights, producing the maximum amount of ultraviolet light possible.
If you don't see the lamp you need, contact us at 1-888-757-9591 or firstname.lastname@example.org.