Those Mean Well 30V power supplies are officially adjustable from 27V to 33V. I just measured one and it actually adjusted from 23.8V to 33.8V
Running the cool white Big W strings from 31V DC results in a current draw of 200mA for the whole 200 LEDs (both channels). That equates to 10mA LED current. You might be able to push them harder, but without knowing the LED specs, you might shorten their life.
Just did a quick (not very scientific) comparison between running the Big W LED strings from their original controller and plug pack versus a DC power supply.
The point where the DC power supply seemed to give the same brightness as the original setup was about 28 Volts. I was running them at 31V which is still below their max current, but it looks like you can run them at a lot lower voltage if you don't need them any brighter than "stock".
I found something interesting (annoying really) with the Big W strings when I went to test the pair that I had cable tied together (as a 4 channel string) to make sure they were all good before putting up.
I plugged one set in, then the other. All worked, but there was a noticeable difference in light output between them. They were identical cool white strings bought at the same time (Big W online).
I then tested all of the cool white strings @ 30V DC (both channel driven). The results:
* Of course, the two I tied together were 107mA and 149mA - Doh!
So, the moral of the story is to check all strings first if you're going to mix interleave them like I did.
I just bought 4 packs of the Big-W 200 LED icicle lights, does anybody know if they can be chopped into smaller sections?, I would like to end up with at least 8 segments total so i half woud be good. Tracing the wiring is making my brain hurt. I will be drving them with 30VDC.
Hi everyone I just notice that the Big W online store has the 200 string led starter packs of multi colour, blue, red, warm white, cool white, and green on special for $15.00 saving $4.92, so I just order 6 more sets of multi colour and 3 of blue, red, green, warm white and cool white for next years displays as they are not posting out til the 16th Dec. Not sure how long the special is on for.