Flash Lamp

Though less commonly used, some consumers have experienced permanent hair reduction through this process. However, there is limited data on how much hair reduction is typical, and how often hair reduction occurs.

The process works in the following manner: Full spectrum (non-coherent) light and low-range infrared radiation is filtered to allow a specified range of wavelengths. This filtered light is delivered from a hand piece into the skin, where it targets dark material such as the pigment in hair.

This is intended to cause thermal and/or mechanical damage to a hair follicle while sparing surrounding tissues.

Advantages:

* Some consumers have experienced long-lasting to permanent hair removal
* Considered safe if performed properly
* Useful for large areas such as backs or legs
* Regrowth can come back lighter in color or finer in texture
* Light-skinned consumers with dark hair have the best results

Disadvantages:

* Long-term data on safety and effectiveness have not been established
* Response rates have not been established
* Not as effective on unpigmented hairs and red or blonde hair
* Must be used with caution on darker skin tones or on consumers who tan themselves
* Improper treatment can cause burns, skin discoloration lasting several months, or patchy/grid-like regrowth
* Requires eye protection
* Is expensive and some find it to be painful
* Regulation varies by state, so inadequate controls exist to ensure competent practitioners
* Some consumers do not respond to treatment

Difference between flashlamps and lasers are:

a. Kind of light: flashlamps do not use one wavelength of light the way a laser does. Flashlamps emit every wavelength of light in the visible spectrum, and a little into the band of infrared radiation (up to about 1200 nm). Practitioners select a cutoff filter to block out lower wavelengths.

b. Size and shape of the spot (beam): Most flashlamps emit a beam that covers more area than a laser and have a rectangular spot, rather than the round type usually standard on lasers.