I actually purchase from a variety of sites depending on sales and availability. Walmart seems to be the cheapest price wise and I've had good success with lights lasting. Also purchased from 1000bulbs.com. Don't think a lot of the LEDs I've purchased can dim/ramp effect with LOR, but I can still create a lot of effects and make a great show. Also, check before buying because newer LEDs don't allow you to change the bulbs if they go bad.