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Supra I think your a little hard on Lux. From my quick read of the data sheets ssl803t, Cree and Lux all spec 2.1Vf @ 350mA typical. In saying that I can get the SSl80s for €1,52 without stars and I think there is an advantage with the optics. I may have to ask nicely at work to get some...

I can't find Oslon bin 3T-4T easily. I found the LMX3-PD01 on stars last night and a reasonable price but lost the link :( Are the Cree's really that much better? Have found them online but they seem pretty much the same as the LMX3?

The drivers on a 400watt system will be getting rid of around 40watts approx in good quality drivers. They can be inside or outside in DIY

Aliexpress is ok but forget about warranty. I buy cheap from there if they have what I want and I can wait a couple of weeks. Pick sellers who have been there for a while and have high positive feedback with a lot of sales.

400 watts of Z2 will put out around the same heat as a 400watt HPS.

Your ventilation would work better is the 4" fans were inside the tent attached to the filter. these fans are much better at blowing than pulling air. It would also be neater.

I gather your running 2x RW75 presently? If this assumption is correct then you could take around another 100watts in the space. Depending on how you grow you could also consider added side lighting as well. Adding a DIY lamp would be a good idea and cheaper than an Rw75 I believe. I think a...

Anyone used these to supplement their veros? http://eu.mouser.com/ProductDetail/Philips-Lumileds/LXM3-PD01/?qs=sGAEpiMZZMu4Prknbu83y5qjVwwqxj2nEpXknzdNQZg= I need to find them on 20mm stars but the efficiency looks good 34 - 42% efficient depending on bin I guess. Not sure what Mouser is...

Seems pretty goodhttp://www.aliexpress.com/store/product/Freeshipping-1pcs-Cree-XLamp-CXA3070-led-74-117W-COB-EasyWhite-5000K-Warm-White-3000K-LED-Chip/815938_2052849889.html €35 for ABs if it real

Should both work fine

Ledil C13658_CLAMP-VERO13-18, with these F13402_ANGELINA-W F13661_ANGELINA-W-B there is a link above but it might not work http://www.digikey.nl/product-detail/en/CA11183_BROOKE-W/711-1083-ND/2354013 A lot of edits, I may try and mount 44mm ones from aliexpress as they are a lot cheaper and...

Vertical space should be ok as I get a tent with 2m of hight. From my previous tests with some China chips I do want reflectors and at 1,6 each it is no big cost increase. I do want the light well spread out and thats the reason I am thinking more along the lines of 13s or 18s. It's a little...

Yes very difficult, at just over €4,20 for the 10, €6,86 for the 13, €12,14 for the 18 and €27,79 for the 29. Todays prices from digi-key. I want around 300 - 400 watts in a 1sqm space

Made by a different company and almost double the price. Meanwell are the go in higher power drivers it would seem. Also the B version of the Meanwell is cheaper than the A

These are a good price for reflectors http://eu.mouser.com/ProductDetail/Ledil/C13658_CLAMP-VERO13-18/?qs=sGAEpiMZZMurHQmwyojo5LwOASaLMSammSDbmKYEG%2bz2MXcDiRqf4A== €1,66 in 1 offs

Thanks Supra, also found this one. A little on the pricey side though http://www.digikey.nl/product-detail/en/LXD200-0700SW/633-1171-ND/2677294 I guess I will go for the meanwell option, 66€ on mouser

I have been changing my mind between different veros. Looking at the vero 13 it looks to be the sweet spot for price, running. 16 (3500k)of those running at 700ma could work well. Now to find a driver with around 280Vdc at 700 mA. would use 8 per heatsink which should be just under 200watts...

it's really a bad idea trying to shock yourself. I am really very cautious when working on mains powered equipment especially if it is non isolated. I've had numerous shocks over the years and every time it happens it is a real bitch.

this is what I will probably go for in a 1mx1mx2m tent http://www.birminghamaluminium.com/heatsink_detail/58?calc_length=600&calc_air_flow=0&update=Update#calculator 2 of this 600x300 should work nice with the help of a couple of 140mm fans

This is the led section, flame wars are pretty common in here pity! I will be starting a new grow in a week or so. New setup in new location. Starting from scratch. Plan is to scrog 1-2 plants under 300-400 watts of led. Diy veros