Wel you are either measuring wrong, have to low of voltage, or are somehow dimming..
What is your power supply and the amount of serial LED's and their respective V(f) @ 1000mA
I am using a Meanwell LRS-100-24. Now that you mention it, I think the voltage is set to around 21 V, I turned it down initially so I wouldn't fry anything while testing.
The string I am testing is composed of all Luxeon ES: (3x) cool blue, (2x) royal blue, and (2x) cyan V(f) @ 1000 ma are: 3.3 V, 3.0 V, and 2.95 V, respectively, so total voltage should be 21.8 V.
I assume that the driver is taking something, so probably I need to turn my power supply up from 21 V to 23 V or so, but will that make much of a difference in the current? I have one of the drivers hooked up to the bluefish, and the others have the pot. terminals bridged with no PWM dimming hooked up, so should have no dimming. I got the same results whether measuring one of the bare drivers or the one hooked up to Bluefish set to run @ 100% - did see a change (as I should) if I turned the channel down.
I am measuring by hooking my multimeter into the circuit in series as if it was another LED. Is that correct? It does appear that all of these LEDs are working properly and getting full voltage: subjectively, the string looks like it is running full power, it's certainly not running at 1/4 power.
I got in touch with Steve's tech support this morning and am going to take pictures for them, that I can post here.
Thanks in advance for whatever help/advice is offered!