Oh I see. This limits you to two Detolf per switch/power supply as they are only enough to power one reel. A five metre reel is not enough to wire up two Detolfs using the |_| configuration. You will need just over 5 1/2 metres plus more just in case you mess up which happens.
Keep in mind, if you plan on expanding you will need another power supply. I've got six on one power supply and plan to add two more but I've been procrastinating forever. Just trying to find a reason to complete the set up.
I have an idea. If you want to come by and check out my set up and get some pointers and a better idea of how bright the 3528s are, shoot me a PM. Bluevale is not too far from Guelph. This might be the kick in the pants I need to get the last two done. I've already got each shelf wired up. Just need to connect them to the power supply.
Can you tell how much I hate wiring these up?