Led intensity (Led current)

Other Hardware LEDs and Multiplexing
1

I'm hoping some one can help me understand.

Long story - Short, I set this led fixture up a couple of years ago. I always thought from my calculations I was driving these at 700mA. I finally got a amp meter to add to my fixture and I was shocked at the readings. Only pulling / driving 400mA per string. After re-calculating I see where I messed up. I need to increase voltage to get mA up.

My question is if i'm still getting good par readings, is this something I should correct?
I know par readings is not very accurate on leds.
And I like that leds & resistors only get luke warm, but if i'm going to benefit from driving them at 700mA then I will.

2

Assuming that you are using resistors to limit current through the LED this is really not a good idea for high power LEDs.

3

I should of been a little more clear on set up. They are ran through mosfets, controlled by arduino and resistors to set current.

Here's a link to where I first set this fixture up. I hooked them up like (dc42) suggested. I eventually switched out some 1 watt leds with 3 watt leds.
http://forum.arduino.cc/index.php?topic=190956.0