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I²R said:Even if you do use separate resistors for parallel LEDs, yoru efficiency winds up in the toilet, since the currents through the LEDs are additive. If you wire them in series, it's much more efficient.
Salgat said:What exactly happens though, since diodes try to have a specific voltage drop, yet each one is fighting for that specific voltage drop.
I said efficiency. If you have a 10-volt source, you can put five 2-volt LEDs in series with no limiting resistor. All your power goes into lighting the LEDs. If you have the same 10-volt source and you use 5 LEDs in parallel, each with its own limiting resistor, where does most of your power go?Brian Hoskins said:Power is exactly the same.