Quote:
Originally posted by ReefEnabler
Stu thanks for posting that reminder.
Most of my LEDs are 1000ma rated and I'm using 700ma pucks.
But I was planning to mix a Cyan LED in one of the arrays, its rated at 700ma max.
Could I just position it at the end of a series and put a resister before it to step it down?
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Negative, negative, negative!!
The same current runs thru all of the elements in a series chain.
But! You can achieve what you want by
shunting the LED of your choice with a resistor so some of the current runs around your LED. Since properly sized and mounted resistors don't fail this is a safe 'paralleling'.
Tell me the expected VF for the LED you want toned down and the current you will be running and I can tell you what resistor you'll want. (Better would be the actual VF, of the actual LED, at the actual current.)