CFLs By MYADDICTION

• This is a low energy compact fluorescents lamp. It has special internal coating to produce deep purple light and large amounts of UV light. The purple glow of a black light is not the UV light itself, which is invisible, but visible light which escapes being filtered out by the filter material in the glass envelope.
• These bulbs emit UVA, the long-wave type ultraviolet light, and are intended for use in special situations. This can be simply for lighting effects, such as in discos, theatres, clubs etc.
• Other uses of UV light is in authentication, e.g. security markings on currency credit cards, certificates of authenticity on software packaging, as well as special inks used by security marking pens;
• UV light can be used for alternative illumination of subjects of photography, as many plants, seeds, fruits, and especially flowers appear different, as they would to some insects, birds, and reptiles that can see near-ultraviolet light.
• Reptiles need long wave UV light for de novo synthesis of vitamin D needed to metabolize calcium for bone and egg production. This is usually combined with the provision of heat for basking by another lamp in their enclosure or vivarium.