Philips TD-L 18W BLB Blacklight Blue F18T8/BLB 24-in 320-400nm Fluorescent Tube

TL-D/08 Blacklight Blue lamps are low-pressure mercury-vapor fluorescent lamps.
They have an inner envelope coated with a fluorescent powder that emits longwave UV radiation to excite luminescence.

A lamp breaking is extremely unlikely to have any impact on your health. If a lamp breaks, ventilate the room for 30 minutes and remove the parts, preferably with gloves. Put them in a sealed plastic bag and take it to your local waste facilities for recycling. Do not use a vacuum cleaner.