More SPAM from Prawn (Psst - buy my LEDs)

Grow room design, HID, fluoro, reflectors, ventilation, ballasts and wiring.
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Prawn Connery
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Post by Prawn Connery »

Here's an MPG first - it' a new LED panel design that will directly replace a 600W HPS with 400W of high-red, high colour index, full spectrum (UV to Far Red) LED light that also knocks a week or so off flowering times.

Someone I know has been working on this design for some time now. :winky:

It's a 450 LED panel with high efficiency, high CRI diodes designed to run in pairs with a 380W driver to be a direct replacement for a 600W HPS.

The test PCBs arrived today and the boards will have the LEDs assembled on Monday. Designed and assembled in Australia, the LEDs are from Japan (Nichia) and Korea (Seoul Semiconductor). The PCBs are made in China, and will come with matching heatsinks as an option.

The PCB is 415mm x 205mm x 2mm aluminium. The LEDs combine the most efficient 3030 LED available on the market with a super-high colour rendering index (CRI 98) LED and a near-UV/UVA white phosphor LED to create a very balanced spectrum from 380nm (UVA to promote THC production) to 730nm (far red for the Emerson Effect).

All the LEDs are high CRI: 90-98 - creating a white light very similar to afternoon (warm red) sunlight. The overall temperature is about 3100K.

Each panel is rated to a maximum 225W (450W per pair), but can be dimmed down for better heat management and efficiency. They're designed to flower continuously anywhere from 100-200W per panel.

I know some of this is a bit technical, but the reason this is such a unique design is because it's the first to combine ultra-high CRI and UVA white phosphor LEDs with a high-efficiency LED that can all be run on one driver (mutli-colour panels usually require two or more drivers to run each channel).

It's also unique as it has been designed as a direct replacement for a 600W HPS - covering a 3'x3' to 4'x4' area. We've been running a lot of grows on LEDs lately using different spectrums and types, and have discovered we can equal 600W horizontal HPS yields with about 400W of LED, while the extra red also finishes plants a week early (speeds up flowering).

Even though HPS has a warmer kelvin rating of about 2500K or so, it has a lot more yellow and green spectrum light in it. High amounts of red accelerate flowering and increase bio-mass, whilst blue keeps nodes shorter.

High CRI LEDs have the benefit of more blue and red light, and less green light - whilst still being a true white light (3100K). They give plants a natural look under light, too, as CRI90+ is very close to sunlight (which is obviously CRI 100). That makes it easier to identify plant problems and health.

I'll have a running update of how this all progresses, but I thought you guys might like to be the first to know..

Any questions, fire away :toker1:
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Post by Prawn Connery »

Here are some of the LED experimental grows:
IMG_0314.jpg
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Post by Prawn Connery »

A few more. I love these things. :laugh:
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Post by Munchy »

NICE! how much in US $ ? :toker1:
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Post by Intrinsic »

Nice "spam". but is there a link for buying?

Yer using a vertical CFL also (can't quite give that up eh). how much do you think that's adding to the LED light production? or just difference in growth?

Wow the specs look awesome, maybe l left indoor growing just too early for the fun stuff.

awesome blossom pics! is this grow started with the new panel?

How is the heat issue, does the heatsink get too hot to touch? stays relatively cool?

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Post by Prawn Connery »

Munchy wrote:NICE! how much in US $ ? :toker1:
Not too sure yet. I guess it depends how many we make and if anyone else's interested. We're making a limited number first, mainly as they're what we wanted for ourselves. It's really a LED panel made for growers, by growers.

They'll be mostly DIY panels and kits, with or without drivers, and wire yourself (red wire in the +, black wire in the - etc, it'll be that easy). Gotta see how well they work yet, but they should be pretty powerful if they go they way we hope.
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Post by Prawn Connery »

Intrinsic wrote:Nice "spam". but is there a link for buying?

Yer using a vertical CFL also (can't quite give that up eh). how much do you think that's adding to the LED light production? or just difference in growth?

Wow the specs look awesome, maybe l left indoor growing just too early for the fun stuff.

awesome blossom pics! is this grow started with the new panel?

How is the heat issue, does the heatsink get too hot to touch? stays relatively cool?
The CFL was for one grow to see if added UV (CFL puts out a bit of UVA/B) made much difference (and also coz the sativas were getting unruly!). UV is usually missing from LEDs, while HPS has a little and MH and CMH have a fair bit more. That was the idea behind using a UVA white phosphor LED.

No, the new panels haven't been assembled and tested yet - we're at the PCB stage. But they should be ready next week. All the other pix are different LED panel and strip slights currently available on the market. That's how it all started: building LED strip and panel frames and wiring them up. We thought there might be a way to build a better mousetrap - there are no real LED panels that are modular designed to replace a 600HPS, the most common HID grow lamp. A lot of them are designed for a 4'x2' or 4'x4' area, with nothing for a square 3'x3' - again, a common size for 600W lamp grows.

400W vs 600W means 30% less heat for the same light output and yield.
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Post by Prawn Connery »

I'm not really saying "Buy my LEDS", BTW - that was just a joke about SPAM :spam:

There might be some boards floating around for anyone interested, though


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Post by Intrinsic »

Thanks Prawn, My old growing area in the attic between joists is 4' x 8' perfect for this size.

Ahh i forgot abut the low UV thing with leds. tho i think leds can be engineered to produce a wide range of frequencies, but don't know if there are any out there with sufficient UV for our plants. if so perhaps an improvement in yer panel for the future.

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Post by bentech »

what would you say is the ideal canopy dimension for those panels?


assume less heat is allowing you to keep them closer to the plants than HID allows are you seeing even better results the simple watts to lumen increase over bulbs?
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