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HLG Quantum Board Kit Review: Part 3 – PPFD Measurements

The final video for the Quantum Board Kit review. Thanks again to HLG for sending the kits – these things rock!

HLG Quantum Board Kit Review: Part 2 – Operation & Analysis

In this second video, we’ll go over how to dim each of the QB kits, then take a closer look at the LM561C, and how the Quantum Boards are physically laid out. We’ll also cover wiring the boards in series and parallel, and look at how to properly match QBs with drivers so you can expand your kit or upgrade your driver. The next and final video in the review will review PPFD results from each of the kits and go over some final thoughts after using them.

Check Out the New Forum

I’ve had a number of requests to add a forum lately and I love the idea.

Rather than just communicate on a one-to-one basis via email, I’d really like to put all of these questions and answers out in the open so others can benefit and participate in the discussion as well. I had initially tried a forum several months ago using a WordPress plugin, but I found it sort of lacking and was immediately overrun with spam registrations and other bullshit. After messing with a few different forums, I settled on phpBB and like how it works so far.

Now, I definitely need your help to get this thing going. If you like the site, have a question, or just want to chat with like-minded people who enjoy this hobby, I encourage you to sign up and make a post. I’ve talked with so many interesting people with great ideas and insights just through the “Contact” button on the site, and would love to get these ideas and inspirations out where everyone can see them, critique them, adopt them, improve them, and so on. One of my main goals when I started writing here was to really focus on community and bring other people who are into this little niche together – I think this is the way to do it and I hope to see you all there.

The addition of the forum doesn’t mean I’m going to stop writing the blog – I intend to continue doing what I’m doing – this is just a means to get everyone more involved and get some input from all of the brilliant minds out there.

I’ve added a link to the forum on the main menu, or you can just punch in to reach it as well. Without a doubt, things will be rocky to start, but we’ll get it figured. As always, I’m open to feedback as well.

Now get your ass over there and post something!



HLG Quantum Board Kit Review: Part 1 – Assembly

This video documents my assembly of the 90 watt, 135 watt, and 260 watt versions of Horticulture Lighting Group’s Quantum Board kits. In next week’s video, we’ll look into how the boards work, how to dim them properly, and how to expand your light with additional boards. Shoutout to HLG for sending me these kits to experiment with!

COB Holder and Reflector Adapter Part Numbers for Popular Chips

Looking for the best way to attach your COBs to your heat sink? Use a COB holder.

COB holders make it much easier to fix your chip to your heat sink and, more importantly, they make wiring far simpler as well. Rather than soldering (which sucks), COB holders offer “poke in” connectivity instead: just strip your cable and push it into the designated holes in the holder. There aren’t many manufacturers of COB holders – the 2 brands that are most prominent are Ideal and BJB. Some COBs (like Bridgelux Veros) don’t require holders at all.

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3000K vs 5000K Grow: Final Update

Warm temperatures have finally arrived and it’s time to move my indoor plants to the great outdoors. I started these peppers in December using 5 gallon space buckets, which they quickly outgrew. Once they were too big for the buckets, I moved each pepper into its own closet and moved one Vero 18 out of each space bucket into these 2 closets.  I initially had a Moruga scorpion and a Chocolate Brainstrain under each light, but due to an incident involving my beloved hound, one of the Chocolate Brainstrain plants was broken in half, so the only real comparison is between the Morugas. Here are the peppers on their last day under the lights:

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Installing a Dimming Potentiometer on a Mean Well HLG-B Driver


Sampling My First Ripe Moruga Scorpion

How to Attach a Power Plug to a New LED Driver

When I got my first LED driver, I was surprised to see that it didn’t come with a power plug on it – this makes total sense though, as there are all sorts of different connectors you can terminate this wire with, depending on where you live or how you want to plug it in. Attaching a plug may seem intimidating, but it’s really quite simple. As long as you get the colors right and makes sure everything’s clean and tight, you’re in good shape.

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Samsung LM561C Strip Build: Finishing Touches

It’s been beautiful outside this past week so it’s been tough to get motivated to finish my DIY Quantum Board build, but I got it done today. I’m eager to see how the plants under these lights do – I think they’re going to work out really well! I’ll be growing lettuce, basil, swiss chard, and kale in Kratky totes. The nice thing about Kratky is that all you need to do is plop your seedlings into little mesh pots (net cups), cut these pots into a tote lid, then fill the tote with water, add nutrients, and just monitor the pH. The roots will grow down into the nutrient solution and drink away at it as required, so no watering is necessary.

Below are the steps I took to finish this light, but first, a quick recap of my final parts list:

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