i ordered several sets from a chinese company on eBay. @ 4.25 shipped a set in colors and in 20, 50, 100 LED per meter. for the cost involved is a test. and once i found what works and need something with a bit "more duty" or look, then i can scout about. i dunna know what to expect, but i know it won't be $100's to find out. plus other lighting ideas can be inexpensive if you can wait and plan your other builds until the kits arrive. so far i haven't been dooped or shorted. the reason for the sets is i don't know what 20 led per meter is in light intensity. it might be right-on or too low, or too high. and they can be cut to length once i've decided.
yes LED has different light angles, spot, glow, intensity, or ambient sorce. so you can buy off the shlf and hope its what you want or keep returning until you get your desired effect.