The other big problem with incandescent lights is that they are relatively inefficient since most of the energy produces heat and infrared light. A typical bulb is around 5% efficient in terms of ...

Researchers at the University of Michigan developed a new type of incandescent ... of an absolutely black body, discovered by Max Planck. While a tungsten light bulb's filament is much warmer ...

Halogen bulbs, a type of incandescent ... A shiny metal reflector casts the most light but increases glare. A black interior reduces glare but absorbs light, so you might need a brighter bulb.