After getting screwed (by my own lack of knowledge) I became very interested in LEDs, as they are the future, and the future is NOW. It's just that you (we) need to know what we want so that we don't get ripped off.
Keep in mind, most LEDs (like most nutes) were/are not designed specifically for mmj, and current offerings are > 2 generations behind. Area 51 is getting ready to introduce new fixtures that should rock mmj. But if they are out of your budget, you can do as I did and DIY using off the shelf screw bulbs
Basics included knowing what lumen watts, CRI, lens angles, heat dissipation, driver quality,... oh, and what mmj friendly spectrums mean. You're going to need to learn it sooner or later. Might as well start now