Celebrity manicurists explain the difference between various devices, and share their top tips for choosing a reliable one ...

CFL’s are commonly long, cylinder shaped and usually coated in white. They are considered energy-saving and are meant to substitute the older incandescent light bulbs that existed prior to these; ...

When the mercury is excited by electricity, it emits ultraviolet (UV) light, which causes the phosphor to emit visible light. Fluorescent lamps have been widely used in commercial buildings for ...

Inside the planter box are two 15W fluorescent daytime bulbs which output a similar amount of UV to normal sunlight. A mirror is placed below them to help reflect all the useful light out of the box.

Highlighter pens contain chemicals that absorb visible light as well as ultraviolet (UV) light, which humans cannot see. The UV light “excites” the electrons in the ink’s molecules and ...

Although initial costs may seem steep to an end-user (LEDs are today around 50 times as expensive as incandescent light bulbs and around seven times the cost of compact fluorescent lamps ...