growmau5 on youtube, look for his early vids, there is a 7 part guide to DIY leds. It will help you understand matching drivers to leds, heat sink requirements ect.
Also the LED section here has some great guides to getting started with led and powering them, just probably have to search for them as they will be buried in all the other shit.
@coreywebster,
I second
@Growmau5.
You can't go wrong with these set ups.
Here are a few YouTube links to get you started:
Here's part #1 of the 6 part series that will take you step by step through the wonderful world of COB's
As far as a good website, try COBkits.com, they are reasonable and they have most of what you need in one place.
If you go with a Meanwell driver, get the "B" version because this allows a potentiometer to be attached and you can set up a wired dimmer away from the driver.
So for for instance the driver number will look like this
HLG-240H-1750B
HLG= Series Name
240= Rated Wattage
H= High Input Voltage up to 305vac
1750= Rated Output Current
B= Function Option
There are typically two Function Options that are available, an A and a B.
There are others available but you rarely see them.
A= Adjustable through builtin poteniometer in the driver casing
B= 3 in 1 dimming function (1-10 Vdc, 10V PWM, and resistance)
I use this driver to run four 50 watt COB's as a clone light, it's basically the light Growmau5 lays out in the first video I attached.