Led Users Unite!

meharmon said:
I get emails from alibaba, and had one come across that led me to this company (Wayet lighting) which is using the spectrum very similar to Solaroasis' patents, "perfect" blend IMO:
Full spectrum: Red 660nm + 630nm Blue 475nm + 430nm
Orange 615nm
White 4500k
IR 740nm
UV 380nm
2) Special Ratio: 77%Red,10%Blue,7%Orange,3%white,3%IR+UV



The company has a decent looking website, and purports to be using name brand diodes. They also sell HID fixtures, so a plus? They also have models of 1W, 2W, or 3W chips. Unfortunately need to bank transfer to trade with them. I wish I knew why you can hardly ever just buy something from a Chinese company. They could do Paypal at least...
But aside form that I think I'll inquire about pricing anyhow as this is exactly what I was looking for spectrum wise, if only the angles were tighter. Still much cheaper than building it myself, and check out this funny page of how they describe this panel, along with what alibaba tried to look for, haha!
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supply ability: 10,000 per month.............talk about cutting out the middleman....alibaba must be a supplier to many of our led companies.....all you need is a custom paint job and you can start slanging led's like hot cakes, lol..........
 
Hehe, there are dozens of companies that could easily be carbon copies of each other on alibaba ("shenzen yournamehere inc, ltd."), but this is the only one I found with those spectrums, so I'm not sure who they are copying except maybe Solaroasis. Of the ones available, 90+% seem to be just red/blue. If the price is less than or equal to my Blackstar I'll gladly chance it. I plan on purchasing a PAR meter in the next few months, so it'll be nice to see how things compare on that scale. The tentative plan is a 400W induction with 2 LED panels on either side, so 4 Blackstars, or +3 of whatever model I end up going with. Bank transfers are easy and cheap in my experience, except for the waiting, but for smaller orders they also accept Western Union, which is a ripoff of course.
Hearing of a company before is nice, but we've all heard of Dell, McDonalds, etc.(who produce crap), and I'm sure I can rattle off a list of highly reputable computer components companies that 90+% people have never heard of-- such was the case with Blackstar just a few months ago, and now we all have heard of Blackstar and agree they are good panels. Fingers crossed?
Oh, did no one notice the suggestion Alibaba tried to find in that pic? If you notice, I didn't search for it myself, hehe.
 
Hi peeps, I'm doing my first grow and everything is going fine so far. Got 4 confidential cheese under my LED, been vegging almost 3 weeks now.
My question is about watering. I transplanted them from little starter pots to 6.5 litre square pots full of canna soil almost a week ago, and watered them slowly until a little water dribbled out the bottom of the new pots. It'll be a week tomorrow and I haven't watered them since - is this right?? the soil still seems to be pretty moist and the plants dont seem too fussed. I guess I'm just asking if 1 water a week is fairly normal at this stage?
cheers
 
The roots are not that big and there is a lot of soil if there happy you should be happy
Keep a eye on them go by how heavy the pots are
Good luck
 
Hey guys- I have been reading thru this thread and there is a lot to catch up on. In my career I have placed tens of millions of LED devices into various products, so I know something about the technology. The vast majority were small indicator/ display type LED's, but I have also worked on high power LED street lights and LED architectural lighting. I can tell you everyone needs to stop thinking of LED's in terms of 'Watts', because this is marketing scam. If you are lucky, when you buy these lights they are full of 'true' 1W LED's. It is true that 2W and 3W LED dies are available, but they are expensive and not in common usage- they are certainly NOT used in the stuff on the market now. If you are not so lucky, then your LED fixture is full of 1/4 or less Watt chips which have been packaged on a small module- I guess this is what they are calling a '3W LED'- but this terminology is patently untrue and misleading. What is the difference? A lot. Efficiency is the primary difference- you put the same amount of power in but get less light out. A true 1W LED die will be about 1mm^2- this is about the most efficient die commonly available out there. Most of the 'modules' that comprise the current crop of LED fixtures are collections of much smaller LED dies bunched together on the module. This is not an efficient high power photon delivery method.

Cree does not make LED dies using AlInGaP (or similar) proces for red LED's. Cree is all InGaN- blue. The higher quality lights coming out of China nowadays use mostly Epistar dies. Certainly the high power red dies come from Epistar as they have experence with the AlInGaP process- unfortunately these dies are maybe 1/3 - 1/4 as efficient as the best of the blue dies. The lower quality and cheaper Chinese made LED lights use God knows whose LED die. Yes- there is a huge difference in the dies- Epistar, Bridgelux, and most of the others use a 'lateral' structured die on a saphire substrate. It is hard to cool these dies, they do not scale up well in size, and they will always run hot, leading to reduced injection efficiency and shorter life. Cree and a very few others are 'vertical' structure dies- typically on an SiC or copper substrate. You can easily scale this technology and both SiC and Cu have much better thermal characteristics than Al2O3 (Sapphire), so you can drive them harder. But, and here is the big but- they are more expensive, they are not available in 'red'. The cost of the LED dies alone would be more than the retail cost of some of these fixtures if their Watt ratings were correct, and you were truly using high quality LED dies like Cree. Anyway, you will get what you are willing to pay for.
 
i've had bunches of talks with led makers from nichia and cree and what you say makes no snse ive got samples from each company in different colors and bridgelux has a 3w chip running 3.2v 2800mah cree has red diodes but they dont makke 660 just 630 red
 
Bridgelux and Epistar are available in 3W diodes and are affordable. Go on digikey and check out the wholesale prices. I agree that CREE's newest 3W technology is completely unaffordable and anyone claiming to use them in spectrum other than white is full of it.
 
Hey LED users, just wanted to show everyone this pic I got the other day off my machete sheath as it lay outside my grow tent (home to my true 395w LED). Its 12 spectrums but I think I can only tell apart like 8 of them in this pic. There is definitely at least red and orange, blue, purple, yellow, green, and maybe a couple variations of each (I know there are white LEDs which put out more than 1 spectrum or something...). One of the 12 can't even be seen my humans (they look off when the unit is on)

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dunit said:
Bridgelux and Epistar are available in 3W diodes and are affordable. Go on digikey and check out the wholesale prices. I agree that CREE's newest 3W technology is completely unaffordable and anyone claiming to use them in spectrum other than white is full of it.
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My main light for flowering is meant to have CREE XP-E Red 3W diodes in it, it was expensive mind at £800 GBP for 280 watts actual draw.
 
BudBaby said:
My main light for flowering is meant to have CREE XP-E Red 3W diodes in it, it was expensive mind at £800 GBP for 280 watts actual draw.
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Well for that price it certainly better have CREE....maybe Tiger Blood too...lol. Well I imagine you will be more than happy with the results from an all CREE panel. How many spectrum is the light and do you happen to know what the lens angles are? There's a couple manufacturers out there that use CREE but the cost is very prohibitive. Seems like the marketing trick is to use CREE whites and claim the unit contains CREE led's without mentioning that its only a fraction of the total. Unless things have changed in the last couple months CREE don't make a 660nm diode either so you need a different manufacturer for your high red.

Bang for the buck Bridgelux and Epistar are certainly the way to go. Numbers I saw showed CREE with an output about 15% better but cost was about 400% higher.
 
This uses a few different and they are custom built by a guy on ebay, ill post a link as he explains it better than i could, i have two of the lights in the ad for flowering and i had a veg light built for me by him also for my veg cab:)

His lights arent cheap but all round they seemed top quality so im hoping the extra expense will be worth it. So far so good with the veg light.

http://cgi.ebay.co.uk/Custom-Made-LED-Grow-Light-Highest-Quality-140-Watts_W0QQitemZ390305585129QQcategoryZ43555QQcmdZViewItemQQ_trksidZp5197.m7QQ_trkparmsZalgo%3DLVI%26itu%3DUCI%26otn%3D2%26po%3DLVI%26ps%3D63%26clkid%3D8478714761474427612
 
I've got the light BB has linked to above, It's been 3 weeks since I turned the light on (18/6) and I'm really pleased so far.
 

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I feel my plants are growing slower in early veg under my LED because the temps are cold. The 395w panel only begins to warm your hand at 2-3 inches away and the glass is barely warm at all, and it only heat the tent above the light 7 degrees above ambient. I'm in WA so its usually cold outside but I usually close my heat, close my door, and leave my window open a bit because of my gaming computer and the LED (LED by itself won't heat bedroom more than 1 or 2 degrees over 16 hours). My air/filter thing is too strong because it does pull in the sides of the tent a lil bit, I feel the lack of warm air produced by the LED plus the tent pulling cooler air in from the bottom is cooling the soil and the plants so that they are growing slower.

So watch out people, you may have issues with COLD using LED lights! Irishboy and other experienced LED growers have discussed that they may have to run HID in the winter months instead of LED (even though they prefer the LED lights)

PS: Plants look great Griffta!
 
from that link "This is the only light in the world that can be repaired by the owner."

mine are able to be repaired at home as well no security screws everything is snapin connectors like mini computer plugs

those look like modified laptop power supplies in that picture too and I know my laptop power supply gets hotter than hell
 
budlover909 said:
from that link "This is the only light in the world that can be repaired by the owner."

mine are able to be repaired at home as well no security screws everything is snapin connectors like mini computer plugs

those look like modified laptop power supplies in that picture too and I know my laptop power supply gets hotter than hell
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I have my veg light on 18/6 and the power supplies get slightly warm at best. There are 4 power supplies per 140 watt light though.
 
Green Dave said:
that Ebay homemade light looks nice and not a bad price
Guys let us know how they work out in flower
Good Luck
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Thanks dude, i didnt mind paying the extra for the quality of these lights plus Richard seems very honest and really knows his stuff and is confident i will get the results im hoping for. My 140 watt veg light is cool also, a bit bigger than the main light and obvioulsy with more blues so it will be interesting to see how my 140 veg light compares to griffta's using his all round light to veg.
 
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