incandescent filaments can produce uv-b, but the glass bulb blocks some of it. incandescent also emits the same light as the sun and considerable energy within the infrared range, which releases nitric oxide, melatonin, etc. the process being that tungsten filament lights have a continuous black body radiation spectrum with a cooler colour temperature, around 2,700 k (2,430 c to 4,400 f),    leds, cfls, fluorescents and halogens are all shit, and we don't need so many lights in the first place. if it's going to be led, then the philips dubai lamp is slightly better, or infrared led panels that are specifically designed to emit infrared. all lights should be incandescent or some kind of vapor lamp. same goes for computer screens, which could also have a switch between white, green or red text on black in tandem with the usual black text on white. colourful user interfaces were only developed to keep you glued to the screen as per advertising. most people do not need colour or even graphics to do their job on a computer. newspapers have been black and white since forever.
Australia