The most significant hazard from conventional lighting is the heat it generates. Incandescent, halogen and HID bulbs operate at temperatures well over 150oC and all forms of fluorescent bulbs can reach temperatures over 80oC.
LED bulbs remain cool to the touch even after prolonged operation
The electronics in fluorescent and HID fittings may produce a buzzing or squealing noise. This comes from the electronic controls required to make them work.
LED and Incandescent bulbs do not require these controls so there is no noise.
Incandescent and Halogen bulbs are manufactured from relatively benign materials but fluorescent lighting contains significant quantities of toxic mercury and the phosphors have strong anticoagulant properties.
LED Bulbs do not contain any toxic materials
All forms of fluorescent lamps flicker during operation. This is not the stuttering associated with initial start up but a flashing effect that occurs too fast for the human eye to notice. Many medical reports link this stroboscopic effect to eye strain, headaches and general concentration issues reported by people using this technology. In extreme cases it can cause a seizure in people who suffer from photosensitive epilepsy.
LED bulbs do not flicker during operation or stutter during initial start up.
High levels of UV light are not good for us. They contribute to fatigue, reduced concentration levels and can cause irritation in those of us who are photosensitive. Modern Fluorescent bulbs are very good at converting their UV emissions to visible light but they still 'leak' a small quantity..
LED bulbs produce virtually no UV emissions,