I have been playing around with the epistar chips and their DC driver boards for a while. The boards are built around the pt4115 chip. Before that it was the little Cree stars that look like a snowflake. I figured out the driver boards are dimmable, either by a shunt resistance or by pwm duty cycle. I also found out that a 10k NTC thermistor makes a good "don't burn up" dimmer while testing fixtures.
The other type I like is the 12v strip light tape. I dug up the specs for what I bought and shared it in another thread recently.
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