Halogen bulbs produce a whiter light and are 10 to 20% more efficient
than regular incandescent bulbs. Halogen can produce more light with a
smaller bulb, and are often used in modern fixtures with sleek designs.
Both types of bulbs can last as long as 6000 hours on average, but
halogen bulbs tend to be more expensive to replace. If you need more
light from an existing lamp there are halogen bulbs designed to replace
most regular incandescent bulbs.