Is »Default« not available in the Style-Dropdown Menu in the Lighting Effects dialog?
Yes, it is there, but I'm trying to reset the styles spotlight, flashlight and floodlight back to their original settings.
Is there a way to do this inside Photoshop? I'd really like these back to their default values, if possible.
I don't want to have to reinstall CS5 or even reset all the preferences as there are many, many settings I'd have trouble remembering to change back.
The Lighting Effects presets are all just files on your disk. Unless you saved over them, they won't change.
And if you did save over them, then you can reinstall, or grab a copy from another install of Photoshop (and they haven't changed in many, many releases).