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Silicon Crystalline Quartz will mess your pumps up but this is a fine powder that does not contain any SQC so it won't mess up your pumps. And it won't cost you anything if you're in SoCal and want to do a run with the powder and under an IG420-Pontoon combo. In the tomato gardens we've been...

It has the potential to be a game changer. It's a a blend I've been getting out of Europe for the last couple of years. D has it but won't grow weed. Only tomatoes. The crop yields and quality from those aquaponic tilapia runs have been truly impressive. I don't have an aquaponic garden...

I'm looking for an experienced aquaponics gardener, preferably in SoCal who is already set up, to trial some fish friendly mineral rock dust I got from a mine in Europe. It seriously kicked ass on the tomatoes we grew and the fish loved it. It picks up the calcium, magnesium, iron and...

I'm looking for an experienced aquaponics gardener, preferably in SoCal who is already set up, to trial some fish friendly mineral rock dust I got from a mine in Europe. It seriously kicked ass on the tomatoes we grew and the fish loved it. It picks up the calcium, magnesium, iron and...

There are bulk discounts on quantities. I visited them last week and was surprised to see how much their 4 pack business has picked up. These 4 packs are more geared towards the commercial grower in that it allows eight 4 pack boxes with 32 individual lights per pallet. This cuts down on the...

High price compared to what? A CFL? I've been growing for 30 years and if you can show me a single CFL grow that consumes 420 watts, 460 with the Pontoon, and yields in the 1 gram/watt range I will bow to your superior intellect and skills. Until then I remain satisfied that my investment has...

The data you reference is being misinterpreted. No one is debating an 85 lumen/watt as a photopic value. What the white sheets you refer to do not reference is the scotopic and photopic ratio that can be applied to get an apparent brightness as a pupil lumen. When applied that value goes up...

What makes you think a quantum meter has a 'mild bias' in the 500-600nm range? They don't. The only difference between a quantum meter and a photometer is that the quantum meter is not photopically corrected and would be calibrated to sunlight spectrums. A quantum meter gives an equal...

The IG website takes the time to explain the differences between general area and plant lighting terms. Because you don't understand something does not mean that it is not a valid term. VEL stands for Visually Enhanced Lumen which the IES formally adopted two years ago as a Spectrally...

This should be required reading by every Chinese SSL manufacturer who wishes to sell us their 'latest and greatest'.

You are basing your decision on a photopic standard for how many lumens the diode emits which happens to be the least important region to plant response. http://www.inda-gro.com/pdf/MeasuringPlantLight.pdf

Okay it was not so sly attempt at sarcasm. These guys piss me off because they hurt induction more than they help it. C'mon everything on their site was lifted from IG and then when they have problems they jump over to LED since they screwed up the design of the hood so that optimum temps...

We're dealing in the world of electromagnetism in an aquatic environment so there are factors that come into play which you don't encounter in free air. However what I do know is that the efficiencies that IG has built into these lamps will run at the same efficiency as in air and what would...

The UVC sterilizer will be coming. The ones they have built work to well to not take them into production. As to the algae project, those lamps are specifically designed for direct submersion and operation with water on the surface of the glass. This is not as simple as dunking the lamp...

You hit it. They are labor intensive to build and designed specifically to work with the 420's. I was in SD where I watched the pontoons being built. It's all hand assembly, including the circuit boards that run the 730 nm diodes and charge the Li-ion battery packs which they also build...

http://www.bendbulletin.com/business/1976469-151/smart-grow-technologies-switches-to-led-grow-lights#

I don't recommend trying this with your HID or T5 lamps. Maybe when they're done screwing around with water and electricity I can convince them to build a 200 watt Pontoon. I'm working on it. :hump:

Induction lamps are electrodeless fluorescent lamps. The difference between brands has more to do with the difference in phosphors they use to emit certain wavelengths and how efficient the design is at getting as much energy from the lamp to the canopy. Like most things in life, all induction...

Hey P! Do you have any threads or journals that you can point me to that show an actual iBeam run from start to finish?

Something occurred to me today. Why does a grow light mfg, who goes to all the effort to lay out all this detailed plant lighting technical information on their site, somehow decide to put 'lux' in their name?