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I hadn't thought of drilling my own mounting holes, great suggestion :clap: You got me thinking, even if the ribs aren't thick enough for drilling, I could probably find another way to attach it (eg. some thin wire). I'll keep that in mind as a backup, in case I can't find a replacement fan. As...

Thanks everyone for the help so far. So the fan is a Mechatronics brand? It was purchased in 2016. Any chance you (or anyone) could help me narrow it down? I'm not knowledgeable enough to use the Fan Selector tool. From the first dropdown in the Fan Selector, I'm assuming I need "AC Low...

Hi! One of my fans on my Cob-Kits light needs replacing. Its an unusual mount, different to most PC fans, so I'm not sure what to look for. Could someone please let me know what type/model/size of fan this is? I've attached a few photos. Thanks in advance :clap:

Thanks for clarifying Thundercat! I'm definitely listening and taking your advice on board. In a few weeks I'll have another 2 quantum boards running, so my light spread will be MUCH more even than it currently is.

Ah yes, the old "HID vs LED" debate. How did I guess this would come up? Sorry guys, but I already decided on LED (quantum boards and COB only). I'm not considering HID lighting for my grow. My research shows that LED (in the right hands) can produce the same or higher quality/yield, for lower...

Well I have to say, I'm glad to hear a different opinion, thanks for that. I've heard similar advice elsewhere - essentially that quantum boards are a different beast to all previous lights, and the old rules don't apply. The other side says that just an exaggerated marketing claim. Now you can...

Thanks everyone for the responses, you guys rock. The consensus definitely seems to be MORE LIGHT! So I've moved my COB's into the tent, aimed at the sides of the plants receiving less light. 720w should be plenty for the two plants in flower. Longer term (like next run, or whenever I use the...

Go for an oscillating fan, something that moves back and forth. The plants only get a blast every 5-10 seconds, and the fan also hits the areas to the sides, stopping any stale pockets of air forming in the growspace. You want to keep the air moving, but avoid having fans pointed directly at...

I’ve recently scaled up my grow, and I’m looking for advice to fine-tune it. Wondering if anyone was interested to take a look and offer their opinions? You’ll find some photos below. Its a 6x6 tent - slightly larger than I wanted, but the price was too good to refuse. At the moment I’m...

Thanks so much for the info, I didn't realize the QB304 had a minimum of 100v, good to know. I was actually thinking to start it around 100v and work my way up, depending on how well I can manage plant height (my growspace is only 4ft vertical space). So the driver you're suggesting would suit...

I'm thinking of buying a QB304 complete setup (board, heatsink, driver) from Cobkits. Need a dimmable driver as my growspace is limited. Which model of driver should I be looking at?

Thanks Gbauto, that makes total sense. I'll be careful connecting the APV-12-12 to mains power!

Thanks Dawg! If I use a normal 2-wire power cord, I'm aware I need to be careful, as it'll be carrying the full power from the mains (220 volt in my country) Is there a safety advantage to using an AC adapter? In other words, if I'm stupid enough to somehow zap myself - Won't the AC adapter...

Hi! I'm working on a new setup and have a Meanwell APV-12-12 to power 2 CPU fans. What is the best (meaning safest and most reliable) way to connect the APV-12-12 to the mains? I have some AC adapters laying around, but I don't know if they're suitable. Could someone more knowledgeable let me...

Thank you, that answers my question :) I have been meaning to buy a wall power meter, will grab soon.

I'm using a HLG-120H-48A driver. No multimeter here (and not planning on buying one), I'm just not into DIY. In laymans terms, where should I have the adjusters if I want the light running at around 75% power? Should both adjusters be kept in around the same position?

Hi @CobKits, my light engines arrived last week, and are running smoothly for a few days already. Thanks again! Quick question - the dimmer on the power supply has 2 adjusters (labelled Vo adjust and Io adjust). Both of these affect the brightness so I'm a bit unsure how to use them. What is...

Cool, no problem, thanks for letting me know. I'm about to order another 1825 engine. Edit: Order placed! Thanks for your great service, its much appreciated by people like myself who don't want to DIY.

Any news on the new COB option? No worries if they're not available yet, I'd be quite happy with another CLU058-1825. Looking to place my order before the weekend.

Excellent news, thanks :) I'll hold off buying until you announce the new chip option.