blacklight
Sign in to savethumb|Blacklight fluorescent tubes. The violet glow of a blacklight is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope.
Article
24 sectionsContents
- Medical hazard
- Types
- Fluorescent
- Bug zappers
- Incandescent
- Mercury vapor
- LED
- Safety
- Uses
- Medical applications
- <small>Fungal and bacterial infections</small>
- <small>Ethylene glycol poisoning</small>
- Diagnosis
- Security and authentication
- Biology
- Fault detection
- Art and decor
- Mineral identification
- Curing resins
- Cockpit lighting, LSD testing and tanning
- See also
- Footnotes
- References
- External links
thumb|Blacklight fluorescent tubes. The violet glow of a blacklight is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope.
A blacklight, also called a UV-A light, '''Wood's lamp, or ultraviolet light''', is a lamp that emits long-wave (UV-A) ultraviolet light and very little visible light. One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV, so the lamp has a dim violet glow when operating. Blacklight lamps which have this filter have a lighting industry designation that includes the letters "BLB". This stands for "blacklight blue". A second type of lamp produces ultraviolet but does not have the filter material, so it produces more visible light and has a blue color when operating. These tubes are made for use in "bug zapper" insect traps, and are identified by the industry designation "BL". This stands for "blacklight".