Good morning,, the dimmer pot is a 100K from amazon prime,, https://www.amazon.com/Linear-Taper-watt-100K-Potentiometers/dp/B0002KRE2U/ref=sr_1_4?ie=UTF8&qid=1479567261&sr=8-4&keywords=100k+potentiometerPulling up a chair! Where did you get your parts from ? Parts list ? I'm interested in your pot dimmer also.
parts listI second the call for a parts list... I've been looking for an affordable (read: not shipped from HK) source for smaller pin fin-style heatsinks.
Nice driver, too. The HLG-240's and 320's certainly are useful.
i think 4 cobs in a 2x2 is way more than enought light,, you will probably be doing some dimming with just 4,,I like where you are going ! I'm in a small 2x2.5 and thinking of 4 COBs just not sure on what to select yet. I saw this and wonder if it could be added "if any benefit" as a 5th and maybe be able to switch it on and off ?
http://www.cutter.com.au/proddetail.php?prod=cut1900
i have a very good friend assisting me with this light build, and he chose these citi'sWhy not go with a 90cri, you'll get the same proportion of blue but your red peak will be in a nicer spot. You have an abudance of light so the slight lose in lm/w wont be an issue.
btw, I recently vegged and flowered under citi 3500k 90cri and there was no stretching at all.
Looking Great!installed dimmer pot, soldered mounted, View attachment 3836417