Quote:
Originally Posted by Jade5051
So, I should use two LPC-35-700 or three LPC-20-700? What I'm gathering is run a series with a driver at 700mA. I won't have to worry about a crappy driver starting a fire and I can run few LEDs than the max output and still get the same result.
|
Sorry I missed this reply. LPC-35-700 says it can handle up to 48V drop at 700mA, 48*0.7 = 33.6W rated power. These are good drivers so you can push them, but it's always better to let them run a bit lower than rated power, heat is the enemy so they will last longer
For 18 3W Deep Reds, you have 18 * 2.2 = 39.6V or 18 * 2.4 = 43.2V so either way you are under the "rating" of 48V, and at 700mA you would have wattage output of 27.72 and 30.24, so technically you could use one LPC-35-700 and worst case (2.4v Vf per LED) you would be running at 90% of rated load. If you used two, each would be running at 45% rated load