Play like CSI

Now that could be very useful indeed!!! I am so getting my self one! Great Discovery!

BTW- they’ve been selling them for a very long time. I got mine from Ace about 4 years ago.

“Black light”

A black light, or Wood’s light, is a lamp that emits long wave UV radiation and very little visible light. They are sometimes referred to as a “UV light”. Fluorescent black lights are typically made in the same fashion as normal fluorescent lights except that only one phosphor is used, and the clear glass envelope of the bulb may be replaced by a deep-bluish-purple glass called Wood’s glass, a nickel-oxide–doped glass, which blocks almost all visible light above 400 nanometres. The color of such lamps is often referred to in the trade as “blacklight blue” or “BLB.” This is to distinguish these lamps from “bug zapper” blacklight (“BL”) lamps that do not have the blue Wood’s glass. The phosphor typically used for a near 368 to 371 nanometre emission peak is either europium-doped strontium fluoroborate (SrB4O7F:Eu2+) or europium-doped strontium borate (SrB4O7:Eu2+) while the phosphor used to produce a peak around 350 to 353 nanometres is lead-doped barium silicate (BaSi2O5:Pb+). “Blacklight Blue” lamps peak at 365 nm.

While “black lights” do produce light in the UV range, their spectrum is confined to the longwave UVA region. Unlike UVB and UVC, which are responsible for the direct DNA damage that leads to skin cancer, black light is limited to lower-energy, longer waves and does not cause sunburn. However, UVA is capable of causing damage to collagen fibers and destroying vitamins A and D in skin.[citation needed]

A black light may also be formed by simply using Wood’s glass instead of clear glass as the envelope for a common incandescent bulb. This was the method used to create the very first black light sources. Though it remains a cheaper alternative to the fluorescent method, it is exceptionally inefficient at producing UV light (less than 0.1% of the input power), owing to the black body nature of the incandescent light source. Incandescent UV bulbs, due to their inefficiency, may also become dangerously hot during use. More rarely still, high-power (hundreds of watts) mercury-vapor black lights that use a UV-emitting phosphor and an envelope of Wood’s glass can be found. These lamps are used mainly for theatrical and concert displays, and also become very hot during normal use.

Some UV fluorescent bulbs specifically designed to attract insects use the same near-UV emitting phosphor as normal blacklights, but use plain glass instead of the more expensive Wood’s glass. Plain glass blocks less of the visible mercury emission spectrum, making them appear light-blue to the naked eye. These lamps are referred to as “blacklight” or “BL” in most lighting catalogs.

Ultraviolet light can also be generated by some light-emitting diodes.

# 13.5 nm: Extreme Ultraviolet Lithography
# 230-400 nm: Optical sensors, various instrumentation
# 230-365 nm: UV-ID, label tracking, barcodes
# 240-280 nm: Disinfection, decontamination of surfaces and water (DNA absorption has a peak at 260 nm)
# 250-300 nm: Forensic analysis, drug detection
# 270-300 nm: Protein analysis, DNA sequencing, drug discovery
# 280-400 nm: Medical imaging of cells
# 300-400 nm: Solid-state lighting
# 300-365 nm: Curing of polymers and printer inks
# 300-320 nm: Light therapy in medicine
# 350-370 nm: Bug zappers (flies are most attracted to light at 365 nm)

Source : Wikipedia.

From what you can see it`s not a toy but also not a nuclear weapon.Just don`t point it at yours /anybody`s eyes and everything should be fine.
I do agree with the other`s comments on dangerous UV radiation but the wavelength makes a lot of difference. your lantern is in upper part of the spectrum “peak 390nm” as shown on the label, so UVA.
Don`t look in the beam, don`t try to get tanned with it. 🙂