Well number one I'm cheap. And number two I never had this problem years ago when I was using a hundred and fifty watt high pressure sodium set up. I guess the thing I'm going to have to get used to is these off the shelf light LED light bulbs are a lot more powerful than I thought. Because like I said I'm using four 13 and 1/2 watt bulbs and 3 9 watt bulbs . This is half the wattage I used to use with my 150 watt HPS set up many many many years ago. Back in the OG days,yes I'm an OG refugee. Back then with a 150 watt I couldn't get enough light to my plant, and now with LEDs I'm getting too much.I was just so surprised that I was getting 20,000 lux at 24 in above the canopy. I believe the hundred and fifty watt HPS was quoted at 16,000. I'm just going to have to adapt that the off the shelf LEDs are just really powerful. Back then I was happy when I got two and a half ounces from my 150 w HPS light and I should be able to hit two and a half with the LED light that I have.
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Off the shelf retail store screw-in LED and CFL bulb comparisons
- Thread starter blynx
- Start date
PCBuds
Well-known member
I downloaded a light meter app and I'm getting 50,000 lux in my backyard with the sun barely showing through the clouds.
I does need to be calibrated (which I can't do without a real meter for reference).
I'm surprised how high the reading is considering it's cloudy.
A different app will give you readings above 20,000 lux.
Edit. I'm getting 110,000 lux in full sunshine.
I does need to be calibrated (which I can't do without a real meter for reference).
I'm surprised how high the reading is considering it's cloudy.
A different app will give you readings above 20,000 lux.
Edit. I'm getting 110,000 lux in full sunshine.
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Trash Can. People are using 2 or 3 of these led lamps per foot, and perhaps 200mm above the canopy. It sounds like you put about 6 lamps within a foot, and positioned them 100mm above the canopy. With this simple comparison, it appears you demanded far too much from your plant.
20k is lame, but plantlets can get their roots out and make a start with that.
40k is workable.
60k is good
Over 60k can trouble some plants.
These numbers are not for everybody. As we put in more light, the demands placed upon us ourselves become greater. At 40k anything in any reasonable compost should be alright. No records broken, but a smoke without much trouble.
With the right environment, you can lay 100k upon them. Just like the mid day sun, which in the wild is generally too much for them. Most plants are not going to respond to much over 80k though.
It's all very hard to measure. Plus we all use different meters, so comparisons are difficult. Each meter tends to work better on certain light types. If we think to hell with it, and spend 1000s on something we expect to be great... It can't get to grips with 660nm. You can keep adding that magic wavelength for cannabis plants, and the fancy meter will barely notice.
This thread starts with a meter that has orange inserts on the casing. It's a common design, still available for about $10. I have one myself. If we all did.. that would really help with comparisons. I believe that sort of meter is primarily measuring green at 555nm. The very middle of the visual spectrum. Most photography meters at this price are said to. So it gives a poor reading under burple leds. Which have little green, but lots of red and blue that we want.
3 100w equivalents per foot once established, at a height of 200mm above the canopy. While getting established, just 2 of them. That works, we have all seen it in this thread.
20k is lame, but plantlets can get their roots out and make a start with that.
40k is workable.
60k is good
Over 60k can trouble some plants.
These numbers are not for everybody. As we put in more light, the demands placed upon us ourselves become greater. At 40k anything in any reasonable compost should be alright. No records broken, but a smoke without much trouble.
With the right environment, you can lay 100k upon them. Just like the mid day sun, which in the wild is generally too much for them. Most plants are not going to respond to much over 80k though.
It's all very hard to measure. Plus we all use different meters, so comparisons are difficult. Each meter tends to work better on certain light types. If we think to hell with it, and spend 1000s on something we expect to be great... It can't get to grips with 660nm. You can keep adding that magic wavelength for cannabis plants, and the fancy meter will barely notice.
This thread starts with a meter that has orange inserts on the casing. It's a common design, still available for about $10. I have one myself. If we all did.. that would really help with comparisons. I believe that sort of meter is primarily measuring green at 555nm. The very middle of the visual spectrum. Most photography meters at this price are said to. So it gives a poor reading under burple leds. Which have little green, but lots of red and blue that we want.
3 100w equivalents per foot once established, at a height of 200mm above the canopy. While getting established, just 2 of them. That works, we have all seen it in this thread.
sylvania osram fire hazard
sylvania osram fire hazard
https://www.prnewswire.com/news-rel...8-led-tubes-due-to-fire-hazard-300132850.html
I also found a report that some sylvania cieling led caused actual fires
I found it when i was looking for led brand name sylvania as i have used sylvania small ceramic metal halides as the showed good spectrum charts .
Im currently using philips 12w led
I had ordered 2 sylvania screw in 10w led,s to test
So i tested them side by side both on same fittings same time
.
I noticed sylvania 10w way hotter to touch than the philips
I had switched them off to unscrew from holder.
More
https://www.osram.us/cb/recall-safety/p001_corporate_recall_led_lighting.jsp
sylvania osram fire hazard
https://www.prnewswire.com/news-rel...8-led-tubes-due-to-fire-hazard-300132850.html
I also found a report that some sylvania cieling led caused actual fires
I found it when i was looking for led brand name sylvania as i have used sylvania small ceramic metal halides as the showed good spectrum charts .
Im currently using philips 12w led
I had ordered 2 sylvania screw in 10w led,s to test
So i tested them side by side both on same fittings same time
.
I noticed sylvania 10w way hotter to touch than the philips
I had switched them off to unscrew from holder.
More
https://www.osram.us/cb/recall-safety/p001_corporate_recall_led_lighting.jsp
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PCBuds,
I don't think this is light bleaching, as a matter of fact I think she's really fine overall.
The few spots could be anything and nothing really.
You can easily spot light bleaching because it looks exactly as what you would imagine if you heard the word light bleaching ;-)
I'm not messing with you, it really does.
Plus it would most likely show up at the newest growth as that's normally closest to the lightsource.
CC
I don't think this is light bleaching, as a matter of fact I think she's really fine overall.
The few spots could be anything and nothing really.
You can easily spot light bleaching because it looks exactly as what you would imagine if you heard the word light bleaching ;-)
I'm not messing with you, it really does.
Plus it would most likely show up at the newest growth as that's normally closest to the lightsource.
CC
PCBuds
Well-known member
Thanks.
I'll just keep an eye open for an overall pale color.
I'll aim for dark green.
3snowboards
Active member
Tk x sfv og
Flowering d7
Flowering d7
Im'One
Active member
Hookahhead
Active member
114w mixed spectrum in a 4.15 sq for space. More info in the “Monkey Shit” link in my signature.
Chopped the tops at 10 weeks.
I left the lower buds go and moved the lights closer for another 2 weeks but forgot to take a picture before harvest.
Harvest of the tops.
Chopped the tops at 10 weeks.
I left the lower buds go and moved the lights closer for another 2 weeks but forgot to take a picture before harvest.
Harvest of the tops.
Hookahhead
Active member
Lower harvest, lots of nice fat buds hanging there!
This was my first time flowering under SILs. I’ve already said it a few times, but thanks to everyone who documented their grows in this thread. I’m still amazed by what a few bulbs can put out.
This was my first time flowering under SILs. I’ve already said it a few times, but thanks to everyone who documented their grows in this thread. I’m still amazed by what a few bulbs can put out.
Impressive work guys.
I arrived to this thread through Terpene's posts and there are plenty of juicy things growing under those SILs.
It's quite cool - and unexpected - how you're managing to get such good results with these cheap-ass lights combos, their output really does add up nicely.
Plus, with impressive energetic efficiency (and as a consequence, all the other resources being better used and managed, less heat output, requiring less extraction, less watering, less space and all that jazz).
Inspiring. A joy to watch.
Kind regards
I arrived to this thread through Terpene's posts and there are plenty of juicy things growing under those SILs.
It's quite cool - and unexpected - how you're managing to get such good results with these cheap-ass lights combos, their output really does add up nicely.
Plus, with impressive energetic efficiency (and as a consequence, all the other resources being better used and managed, less heat output, requiring less extraction, less watering, less space and all that jazz).
Inspiring. A joy to watch.
Kind regards
3snowboards
Active member
102 w grow
@40 days
Tk x sfvog
The truth
@40 days
Tk x sfvog
The truth
