How this works...
The LDR (I placed an LED next to it in the circuit not connected) in EC is the LDRs value is the 30k resistor
the LDR will be 5 to 10k when it's very bright! and hundreds of K when dark!
how to use...
1. set the LDR 30k , reduce it to 5k to simulate the LED getting brighter
now if the LED gets brighter because of summer or heat the led brightness increases, the circuit will will then shunt the led driver transistor to ground making it less bright! simply drop the LDRs value from 30k to 5k very bright, and the current of the LED is regulated.
now as the LEDs brightness gets brighter the current goes up, but the LDRs resistance drops turning on the transistor, depending on your voltage, wattage, you will have to adjust the values... use a power transistor
