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will 500mA produce enough intensity in a 36V vero? box is 1m tall, thanks

Hiya, Im not up to date with cob manufacturers at the moment; What is considered best cob available at the moment for driving at 1400mA? Many thanks, UKP

Hello, Been lurking for a while, I've finished 2 grows with 4 x cxb3070 @ 700mA both times plants have suffered from some ailment about 4-5weeks into flower, I'm not sure what it is and I was hoping some of the LED guys could take a look. Cab is about 1M tall, medium is verve multi purpose...

Hello, I have at the moment: 2 x 3000 & 2 x 3500k cxbs. I'm considering adding 2 more, this lamp will be used for vegging aswell as flowering, I assume it would be best to add 1 x 4000k & 1 x 5000k? Any thoughts or suggetions ? thanks, UKP

Hello, Can anyone with a bit of experience suggest the min height between canopy and COB surface, running @ 700mA. thanks, UKP

Hello, I will be buying some new chips soon. :D I will be running 4 x 700mA - I take it at this drive current the preferred cob is the cree? Would I get a better spectrum mix from 2 x vero and 2 x cree? is the opinion still that 4 @ 3000K is the best option? or maybe 3 @ 3000 and 1 @...

Does anyone know what the ND suffix is?

If I put a massive chunk of aluminium or cooper in my grow room/ big volume,/ small surface area/ (opposite to heatsink) say, 1-2" tall and the same footprint as my box. (and put it under pots) In theory it would absorb heat during lights on, and release heat during lights off.- YEa Nice...

My plant is not looking healthy, anyway, I decided to re pot and...... The roots were surrounding the perimeter of the compost ball (bit root bound), but there didnt appear to be many roots at all in the centre of the compost ball. Is this normal for healthy or unhealthy plants? thanks, UKP

http://www.uk420.com/boards/index.php?showtopic=354349&page=7 check that out if you want a view of another fourms perspective on LED vs HPS. starts at page4. interesting points interspersed with stupid comments!

Hiya, I wanted to compile a list of grows which acheive great than 1g/W Not really fussed if you accounting for fans and ballast losses or not. I hope to add my name to this list in 2 months, but as its my first time round I feel I might be waiting a while! Have you grown with greater...

Hello, I've seen this heater and would like some advise; it mentions it uses a PTC resistor to control heat output, however if I put my thermostat in the power supply feeding this I assume I will have the control? Anyone got anything similar? or advice...

Hello, Just interested in starting a thread about heating and ho to do it most efficiently in small spaces... I'm currently using a small tube heater with a built in stat to control the heat in my groom, my concern with this is that I am only heating the air, which is being sucked out of the...

Hello - long time lurker, first time poster... I have purchased one of these drivers. http://uk.rs-online.com/web/p/led-drivers/8046136/ I'm setting up a small cab (1m x 0.5 x 0.5) dimming will be crucial to getting the temps right in such a small box This morning I have attached a 100k pot...