I read that scientists are saying halogen light bulbs emit UV radiation which can cause skin cancer. The article also says that a glass or plastic cover over the bulb will eliminate the risk. Are these claims true?" While it is true that some halogen and fluorescent light bulbs do emit UV radiation, these emissions are low especially when
The lamp brightness is proportional to the average power of LED. Average power P = (IoVoTon+0)/Ts, P =IoVoTon/Ts. Let D=Ton/Ts, P =IoVo D; Duty cycle is the ratio of the duration of the LED turn-on to the total switching period. So the brightness can be adjusted by adjusting duty cycle D with high frequency. Aestheticians and dermatologists incorporate it in their facials, while various skin-care brands have developed their own infrared/LED combo devices, for at-home use. “When infrared light is used in the form of a device, it is thought to help [boost] collagen production, reduce inflammation, and improve skin cell repair,” explains Dr A: UVC radiation can cause severe burns of the skin and eye injuries (photokeratitis). Avoid direct skin exposure to UVC radiation and never look directly into a UVC light source, even briefly. It can’t break chemical bonds and damage DNA, and it’s not a hormone like estrogen, which, in excess, can cause changes in the breast that can lead to cancer. Light is, by definition, the . 17 363 224 267 284 299 425 496