I have mixed 3000k and 5000k and 3500k and 5000k. the 3500/5000 is a little bluer for more stacking. I imagine the 6500K provides more stacking during flower. I thinkj the 6500K can be a good veg and mix with some 2700K or 3000K for some real nice mixed spectrum.
that sounds like a good mix. maybe a few switches to turn off/on various spectrums for observation.
If your strip is 48v wire them in parallel. Parallel wiring adds current, while series wiring adds volts. Ex. You have a 48v. Three strips = 144v enough Forward Volts to fill a HLG-185H-C1400B MW driver available from TRCelectgronics for like $36-$42. So three strips wired in series, one to the next, will run the diodes at 100%, when you want to run them at around 150mA vice 200mA. Add up the amps. With just one strip it will be 200mA to lower amps we need to add parallel strings that are also three strips long, as well. So now we have to take the current available from the driver 1400mA. With one string all 1400mA will go one string. BAD. 200mA max current flow. The minimum rows you should use is seven rows. 7 x 200mA = 1400mA. However you want to drive them closer to 150mA . So we divide 1400/150 and we get 9.3. SO let's say 8 rows is 1600mA we would divied 1400/1600 and get .875 * 200mA and we get 175mA. That is about 180lm/w. Not bad. you can do better by adding another row setting the current flow at 1800mA which is .78 * 200mA = 155mA. The sweet spot. You will also have a large amount of diodes spread over a fairly tight area like this diy build using a HLG-185H-C1400B driver 200w.
Use a relay pretty easy to find DC rated ones well over 3amps switching capable. This one might work I didn't go over the datasheet but the specs offhand look like it would 120vDC 3A 72W max is more than enough to turn off individual strips if you wanted to do more than one I'm sure you could find a higher rated one on Digikey or whatever.
) out of a 3x3 light fixture (320,000 lumens)Haven't looked into relay costs, that might be an option. Would want to keep relay + switch under $.50 per strip controlled or it would not make financial sense for the build.
That'll make it tough those cheap relay boards all over ebay are only rated up to 30vdc from what i've seen which is pretty standard, can't say I've seen a 48vdc+ relay cheaper than $1.50 unless you're buying in bulk.
Yes, that has been one of the limiting factors of this design.
