I don't remember exactly how outdoor bulbs are rated but there's some specific classification system for weather and moisture exposure that most bulbs are rated for one way or the other. Google it.
As far as LED 120v floods go I got some really nice par38 replacements from Lowes. Utilitech brand, made by feit. They're 1400 lumens (read: bright) and have a relatively focused beam (not sure the exact number, but they work well from my second-story overhangs), 3000k, rated for outdoor exposure, etc. Dimmable too if you're into that. Cost about $30 each.
Downside is glare because the light all comes from the center of the bulb.