The best grow logs i've seen is BritishHempire (for LED-only) and The_B0fin (for LED+CFL which is probably the way to go if you're going to start with LEDs)
These aren't on riu but a quick google will find them on their respective sites
I really don't recommend starting out with LEDs unless you're not on a budget, have lots of time to waste, and like annoying electronic shit
If you're going to do it though, the high powered ones are the way to go. The cheapo low powered leds just don't have the light intensity to make that much of a difference. The high powered ones are still not that good, but better
I dont know if this has been brought up before but doea anyone have a grow journal or know of a video using REAL high-power LEDs? By "real" I mean the >3W LED's. I've seen the instructable but I havent seen anyone growing herb with it. Let me know guys.
edit- When I say greater than 3W I mean 3W EACH, not added all together. ie- 3 LEDs= 9Watts