Well, it looks like you can add another contender to the great light bulb debate -- a group of researchers from RTI International now says that nanofiber lighter is more efficient than incandescent light bulbs, and safer than compact fluorescents. The secret to that, it seems, is a combination of nanofiber-based reflectors and photoluminescent nanofibers (or PLN), which together are able to form a lighting device that pumps out more than 55 lumens of light output per electrical watt consumed. That's five times more efficient than a regular incandescent light bulb, and since there's no mercury, the researchers say it's far safer than CFL bulbs. What's more, it's also apparently able to produce more natural light than CFLs, although there's noticeably no mention of potential pricing -- they do say that the first products using nanofiber lighting could be available in three to five years, though. Video after the break.[Thanks, DeFlanko]