Lighting Hps or LED?

[pop22]

Like this:
The CFL's have been removed and replaced with warm white 15 watt LED spotlights actual power consumption? 68 watts!

I started this from seed under that light:

Actually cree(or any other) warm white floodlights have better spectrum for growing than Hps lamps, so no wonder people use them.
Even better is to make one of your own, many different cobs are available, cree and osram are top quality but also cheap chinese cobs do the deal well, not far behind.
A combo of cool+warm white floods is good for the whole cycle, people usually get a yield around 1g/W easily with diy cob and flood lights which is better than average hps growers.

 

[dota2]

I'd go with 600w hps + OG reflector for that space. Idk about gavita much. Can you cool it in a small place like that? The makers of OG released a double ended fixture with cooling and everything. Problem with cooling DE fixtures is when you blow air in the buld it causes a slight spectrum change... Or somethin. But anyways, if I'd affort a hps system I'd go for the OG.

 

[evol]

I have a Gavita and it does get warm when on full power (1,100w) I have been running mine at 800w this summer and it doesnt get too hot. they also have a thing you can get that will automatically dim the light if the temps get too high. I LOVE my gavita but remember to change the bulb and reflector every 6 months for best results

 

[dota2]

I have a Gavita and it does get warm when on full power (1,100w) I have been running mine at 800w this summer and it doesnt get too hot. they also have a thing you can get that will automatically dim the light if the temps get too high. I LOVE my gavita but remember to change the bulb and reflector every 6 months for best results

What's the size of your room?

 

[evol]

approx 9' x 8' x 7' (L x W x H). I also have a 400w solarstorm LED and another 400w hps digital ballast in there and sometimes run a blackstar 240w also.
oh and I dont have an outtake fan pushing hot air out. just one bringing in fresh air and a single slit vent across the top of the entire ceiling

 

[Ram003]

Hi there, what's your suggestion for flowering? Shall I setup all channels 100% intensity? Or use bloom mode? the defaukt data is: channel1: 100%, channel 2: 80%, channels 3: 0%, channel 4: 100%, the light is 400w LuminiGrow 450R1, http://www.luminigrow.com/luminigrow450r1/specs/.
Ch1:22*2 pcs Deep red leds, 2*2 IR 740nm leds
CH2:4*2 pcs White 6500K leds,8*2 Royal blue 440-455nm leds,4*2 UV 410nm leds
Ch3:18*2 pcs Blue 470nm leds
Ch4:23*2 pcs Red 620~630nm leds

 

[Nuggz]

I'm setting up a small grow area and have decided to use a combination of CFLs and LED. I already have the CFLs and money is tight so I might as well use them. I think adding an LED to the mix will help put the weight on. Ebay has some great prices and a lot of vendors offer free shipping and will build an LED to the exact light spectrum(s) you specify.


That said, I used 1000 watt Halides for years and they're great if you've got a large grow space and are growing in soil. But I found them terrible when I decided to switch over to Hydro. I did 5 gallon DWC bubble buckets and had to fight high water temps all the way through the grow. Never again!


It's back to soil for me and since my dinky grow room will be in the house, I won't worry at all about heat issues. If I had the money, I think I'd go with LEDs all the way.

 

[HolyTHC]

Hi guys. I will post my research and testing tesults, also my oppinion (IMHO) about optimal DIY LED lights.
What your plants really like - is constant flow of lots of lights energy, and in all that flow it likes most peaks of 450, 660nm
So, here is recipe for quality lights, which will give you good results for a price.
Let's say we're talking about 150W LED setup. We will divide all power into 2 groups - 100W and 50W.
100W may be used to get main full spectrum light fro white LEDs. Lets go further and analyse those white LEDs.
White LEDs are possible in "warm" and "cold". "Cold" has highest PAR and best ability to go "under leaves" on plant, also it promotes bushing, as it has many blue in it. Warm has more red, it is more suitable to flowering, but it alone will not give such good result. So, after some research i found, that optimal mix is 2 cold : 1 warm. I understand that you will think now "but in flowering you need more red" and you are damn right. That is why we will use another - colored diodes. And exactly, 660nm reds and 450nm blues. SO, we have 150W total, 100W of these are whites, what's left is 50W of colors. From that 50W of colors we need this mix: 40W of 660nm reds + 10W of 450nm blues.
In result what ve got is nice real full spectrum light with peaks right for plants.
150W total, 66W cold-whites (~6000K), 33W warm-whites (~3000K), 40W reds 660nm, 10W blues.
Also here are few other spectrums which could be added to mage lights even better, but they are not mandatory.
Green (~530nm) promotes absorbtion of all other lights, lenghtens internodes. This is why plants under HPS streches so much.
IR 730nm - regulates internode lengt, works on plant's raspiratory systems, recommended 5W on 100W total
UVB - promotes oil production as plant defence mechanism. Recommended 15W on 100W, mau be added byfluorescent UVB lamps, not LEDs.

Recommended LEDs, which gives good results: Cree, Philips Lumileds. Philips Lumiled rebel are really great and maybe even best, but slightly expensive. But it works for the money.
There are methods on reaching higher lm/W by putting LEDs in partial power. On 30% load some chips gives out up to 200lm/W. It is great and everything, but it takes several costly chips instead of 1. ALso it has much longer life. Very much.
Main thing in LED setup is cooling. Bigger are the radiators - the better. Absurdly huge radiators are the best Chip temp pays very important role in lm/W output and even bigger role in LED lifetime. Cooling is even more important than LEDs which are used, i'd say it's number one importance.
That's it. These are results from more than a year of my research, personal testing and discussing with other growers.
Hoping that this post will be useful to somebody.