4x 100w COB's in a 4x4 tent with light mover?

E2DX

Member
4 parallel COB's in a 4x4 tent with a light mover with the 2x HGL-185H-C1400B and 4 Vero 29 3500K "C" Could dim them down and bring closer to the canopy and the light mover could be used later for "further expansion" later down the road. Decent idea or a flop? Input and thoughts?
 
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freemanjack

Well-Known Member
4 parallel COB's in a 4x4 tent with a light mover with the 2x HGL-185H-C1400B and 4 Vero 29 3500K "C" Could dim them down and bring closer to the canopy and the light mover could be used later for "further expansion" later down the road. Decent idea or a flop? Input and thoughts?
That setup would give you 25w per sq foot which is a reasonable amount of light, if you are planning on concentrating this in half the tent then have the mover oscillate to and fro to cover the full area, that would give you 50w/sq ft for half of the canopy, this might be excessive and bleach your tops. I'd say you are a bit short of the mark with total wattage and a little too high with localised wattage so the results could be perfect or cause problems, I for one am intrigued to hear how it works out.
 

thetr33man

Well-Known Member
400w in a 4x4 will grow nice plants, ive seen it done with 300, over 500 could be excessive in some situations.
 

Kerovan

Well-Known Member
400W is a bit weak for a 4x4. I would spend a little more and get a few more cobs and spread them out rather than relying on a light mover to spread the light around.

I'm also not that educated with cobs, but I thought you wanted to run more cobs at lower wattage than a few at high wattage for efficiency. Isn't 100W per cob a bit high?
 

E2DX

Member
400W is a bit weak for a 4x4. I would spend a little more and get a few more cobs and spread them out rather than relying on a light mover to spread the light around.

I'm also not that educated with cobs, but I thought you wanted to run more cobs at lower wattage than a few at high wattage for efficiency. Isn't 100W per cob a bit high?
The VERO29 can take that much power data sheet says this particular COB can take 169watts thats with different drive currents and voltages if you can keep them cool. Few months ago i got a pretty good deal on 12 cpu coolers for about $1.50 USD each so I will be using them says it can handle 95watts TDP. Im basing this build off Timber Grow Lights 400watt Vero29 kit but not willing to drop 5 bills on a light system I can build for half. I know I should use a PPFD meter to get the canopy dialed in to around 800 - 900+ umols in flower and mabe 600 - 700 in veg need to look more into it, That raises another question Do FLUX, PAR, PPFD meter's work with cobs... I heard somewhere they need to be calibrated for LED...just not sure if they give accurate readings out the box with COB's And still confused about how to properly measure the given amount of light these badboys put out, can i get away with a cheap $30 LUX meter or buy a really expensive meter to get good TRUE readings?
 

CobKits

Well-Known Member
The VERO29 can take that much power data sheet
clu058s can 'take' 500W but people still run them at 50W

And still confused about how to properly measure the given amount of light these badboys put out, can i get away with a cheap $30 LUX meter or buy a really expensive meter to get good TRUE readings?
depends if you need 'true' readings

hundreds of dollars on a light meter could be spent on upgrading the rig itself
 
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