100w replacement LED bulbs for small spaces

BobCajun said:
This shows the kind of growth you can get with just ten 100w replacement bulbs in a 3'x1.5'x4' cabinet, 140 watts total output, diffusers cut back to 1/2", all 2700k. The growth looks perfectly healthy. It's actually a lot brighter in reality than it looks here. I might be able to put 2 more bulbs in but that's about the maximum I would try. If a person really wanted to they could squeeze 18 in there, 252w.

fee7.jpg
Click to expand...
How much do those cost? That seems like an expensive option with all the cheap cobs and the quantum boards that are available now. Really cool build/grow just curious what the setup cost for the lights and everything to mount them
 
Ryante55 said:
How much do those cost? That seems like an expensive option with all the cheap cobs and the quantum boards that are available now. Really cool build/grow just curious what the setup cost for the lights and everything to mount them
Click to expand...
It actually costs much less than COBs, about 50 cents a watt. It's the best deal in LED lighting available. And the beauty is that you can just walk into any hardware store and buy them off the shelf. You have to get the cheap lampholders I mentioned though, otherwise they'll ass up quickly and add to the total cost.
 
Cloudy.ore.gone said:
There is new lights better suited to plant growth just recently swapped 2 85watt leds for a much nicer 216watt on 57 rn on Amazon and saw a substantion growth increase
Click to expand...
White lights have been shown to outperform combinations of red and blue so no reason to buy special plant lights, and these ones you can buy off the shelf in most stores.
 
BobCajun said:
It actually costs much less than COBs, about 50 cents a watt. It's the best deal in LED lighting available. And the beauty is that you can just walk into any hardware store and buy them off the shelf. You have to get the cheap lampholders I mentioned though, otherwise they'll ass up quickly and add to the total cost.
Click to expand...

Oh I thought these ran at like 100lm/w which would mean u need alot more watts to match the light output of a QB or some cobs. If these run at 150lm/w or more I can see it being alot cheaper
 
BobCajun said:
White lights have been shown to outperform combinations of red and blue so no reason to buy special plant lights, and these ones you can buy off the shelf in most stores.
Click to expand...
May I ask where this study is because I think you may be mistaken plant can only obsorb light at different wavelenghs I have been told 660-620nm and around 465nm are the 2 main section of the spectrum plants pick up
 
Cloudy.ore.gone said:
May I ask where this study is because I think you may be mistaken plant can only obsorb light at different wavelenghs I have been told 660-620nm and around 465nm are the 2 main section of the spectrum plants pick up
Click to expand...
These white lights put out more light in the red an blue range than the mono leds you just get the rest of the spectrum as a bonus so while your logic may be correct you need to do more research in the spectrum of the white lights
 
Cloudy.ore.gone said:
May I ask where this study is because I think you may be mistaken plant can only obsorb light at different wavelenghs I have been told 660-620nm and around 465nm are the 2 main section of the spectrum plants pick up
Click to expand...
I don't have a study but this video seems to show that white is a little better. The white LEDs are also a lot more efficient than red ones. Blues are most efficient. You would need some red for flowering to take place though, even if it was just 5 minutes at the end.
 
Last edited:
Ryante55 said:
Oh I thought these ran at like 100lm/w which would mean u need alot more watts to match the light output of a QB or some cobs. If these run at 150lm/w or more I can see it being alot cheaper
Click to expand...
Well they put out 1500 lm from 14w so a little over 100 lm/w. That might be with the diffusers though. It may be less efficient than lightly driven COBs but also less costly. You would have to put probably 36 bulbs in a 3x3 area though, so it's a lot of lampholder installing. It would be almost solid lampholders. On the good side, the light is very evenly distributed.
 
BobCajun said:
Well they put out 1500 lm from 14w so a little over 100 lm/w. That might be with the diffusers though. It may be less efficient than lightly driven COBs but also less costly. You would have to put probably 36 bulbs in a 3x3 area though, so it's a lot of lampholder installing. It would be almost solid lampholders. On the good side, the light is very evenly distributed.
Click to expand...
Ya that's pretty sweet you could probably do a really awesome vertical grow with those and I think some are dimmable you would probably get way better efficiency if you dimmed them down an ran a few more of them
 
Ryante55 said:
Ya that's pretty sweet you could probably do a really awesome vertical grow with those and I think some are dimmable you would probably get way better efficiency if you dimmed them down an ran a few more of them
Click to expand...
Yeah maybe, the dimmable ones are a lot more costly though. I guess it's only practical for small spaces due to the number of them required.
 
On the subject of red/blue grow LEDs, here's a video I just watched that compares a MH to R/B LEDs. Somewhat lower wattage for the LED but not enough to explain the difference. Also, you supposedly don't need as much LED wattage as HID anyway.

 
Here is my DIY combination of a $95 Cree XML2 led kit from RapidLED.com along with 4 screw in LEDs to light my small veg box. Thanks BobCajun for the inspiration to switch from cfls. Less heat, more light! Also a question if you can answer. I tried wiring my led bulbs in series like you have in your pic but they didn't work. One lit, two didn't and one flashed on and off. lol. I rewired them in parallel and they worked fine. Could it have been the different wattage led bulbs I used?
 

Attachments

  • DIYlight_0102.JPG
    DIYlight_0102.JPG
    3.7 MB · Views: 31
Last edited:
They should always be wired in parallel...Bob has his wired parallel as well..look closer at the pic and you'll see he's running a double wire to each socket.
 
BobCajun said:
I don't have a study but this video seems to show that white is a little better. The white LEDs are also a lot more efficient than red ones. Blues are most efficient. You would need some red for flowering to take place though, even if it was just 5 minutes at the end.
Click to expand...
Interesting video but as he went over in it you can't flower under just white you still would need red. Possible idea for a diy find what color temp of white has most efficient growth and then on seperate switches add on other color temps
In addition to putting light lower down inlayed in the wall possibly
 
Cloudy.ore.gone said:
Interesting video but as he went over in it you can't flower under just white you still would need red. Possible idea for a diy find what color temp of white has most efficient growth and then on seperate switches add on other color temps
In addition to putting light lower down inlayed in the wall possibly
Click to expand...
That me
Cloudy.ore.gone said:
Interesting video but as he went over in it you can't flower under just white you still would need red. Possible idea for a diy find what color temp of white has most efficient growth and then on seperate switches add on other color temps
In addition to putting light lower down inlayed in the wall possibly
Click to expand...
That video is super outdated I hope no one uses any info from it. most efficient light tech right now is white mid or high power led
 
I am running 2 spacebuckets, 1 for flower, 1 for veg/clones. My 90w UFO was killing my clones for some reason..I switched to a SINGLE 15w (100w output) 6500k LED bulb from walmart attached to a 2 prong to screw in adapter and it works PERFECTLY. Even placing raw cuts in a dixie cup with no hormone, nothing it sprouts roots in 2-3days and another 4-6 days to move into dirt.

My flower bucket consists currently of a 180w UFO LED, however I might switch to 2 15w 2700k LED bulbs with the diffusers removed. The light is very concentrated, and really simple to setup.

My next goal is to take them apart, and mount them to aluminum strip to mount flush on the lid :)

Also note, my space is less than 1'x1'..so that is why the lower watts work
 
You must log in or register to reply here.
Back
Top