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Moving the LM317 from heat sink is a good thing. It only helps. For the heat sink shown in post #30, I would not push more than 1.5 watts thru. If you put 5 watts thru it, you will most likely be melting stuff. -A rule of thumb is that you need 9 square inches of surface area per watt of...

The heat sink and thermal path is the limiting factor. Whether or not you mount the driver remotely, the heat sink has to remove the electrical power away from an led. LED's convert ~ 20-30% of the energy used into light. The remaining power is converted into heat. Since LED's do not...

Shortstack, the products from LEDSupply are good stuff. The drivers are very efficiently designed. An oversimplification is that they only pull the power needed. An LM317 is a quick an easy way to power a circuit. It can be configured as fixed or variable voltage regulator, fixed or...