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 themThis 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.
100w replacement LED bulbs for small spaces
- Thread starter BobCajun
- Start date
BobCajun
Well-Known Member
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.
BobCajun
Well-Known Member
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.
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
Cloudy.ore.gone
New Member
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
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
BobCajun
Well-Known Member
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:
BobCajun
Well-Known Member
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.
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
BobCajun
Well-Known Member
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.
El Stinko
Well-Known Member
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
Last edited:
El Stinko
Well-Known Member
I see it now. Thanks
Cloudy.ore.gone
New Member
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
That me
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
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