they ARE fluro lamps.. and they include inert gases and a small trace of mercury, which emits UV light waves.. far as I was to kno, this is what helps plants grow.

[QUOTE="Some article"A tube black light is a basically a fluorescent lamp with a different sort of phosphor coating. This coating absorbs harmful shortwave UV-B and UV-C light and emits UV-A light (in the same basic way the phosphor in a fluorescent lamp absorbs UV light and emits visible light). The "black" glass tube itself blocks most visible light, so in the end only benign long-wave UV-A light and some blue and violet visible light pass through.

An incandescent black light bulb is similar to a normal household light bulb, but it uses light filters to absorb the light from the heated filament. It absorbs everything except the infrared and UV-A light (and a little bit of visible light).[/QUOTE]

whatcha think?
sheist Reviewed by sheist on . Growing with Black Lights? Growing with Black Lights? is it possible? effective? could i use it during "night time"? Rating: 5