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Rate my setup
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- Posts: 39
- Joined: Wed May 13, 2020 8:46 pm
Rate my setup
These are 2 24. in 20w 5000k florescent tubes... my question, do I have them to close to the top of the container? All sorts of different seedlings in there. Any suggestions would be appreciated
"Beauty is often hidden behind a veil of ugly"
- One Windowsill
- Posts: 544
- Joined: Mon Sep 12, 2011 5:27 pm
- Location: Manchester
Re: Rate my setup
Are they t12 tubes? 1½ inch diameter?
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- Posts: 39
- Joined: Wed May 13, 2020 8:46 pm
Re: Rate my setup
Ummm, not really sure. They are just the normal size bulbs I've seen... they are definitely not t5s
"Beauty is often hidden behind a veil of ugly"
- Steve-0
- Posts: 716
- Joined: Tue Mar 31, 2020 2:55 pm
- Location: Salt Lake Valley, Utah...high mountain desert climate
Re: Rate my setup
Looks like a nice set up to me. Let them grow!
Re: Rate my setup
Don’t overthink it. If they’re red move it up if there green leave it
Re: Rate my setup
Where did you buy your grow light setup? I’d love to get something similar.
Re: Rate my setup
How many lumens per square foot (fc) reach the seedlings? You can use phone apps to measure this
Los Angeles, California (USA)
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
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- Posts: 34
- Joined: Thu Mar 04, 2021 11:20 pm
- Location: Newport Beach, CA (Zone 10b)
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- Posts: 39
- Joined: Wed May 13, 2020 8:46 pm
Re: Rate my setup
Shane, i did not know you can get light meters on your phone! thats pretty cool... ill have to check that out. i dont know how many lumens actually make it to the seedlings, but i will post some update pictures
"Beauty is often hidden behind a veil of ugly"
- From0to10in2weeks
- Posts: 185
- Joined: Tue Jun 30, 2020 11:45 am
- Location: Berlin, Germany
Re: Rate my setup
I'd be also very interested in what how much light in lux (lumens/m2) reaches your seedlings. Adjusting the light is the biggest unknown in my first endeavour raising seeds.christ_hears wrote: ↑Sun Mar 21, 2021 5:47 am Shane, i did not know you can get light meters on your phone! thats pretty cool... ill have to check that out. i dont know how many lumens actually make it to the seedlings, but i will post some update pictures
But my recommendation is to buy a cheap lux meter instead of a phone app. Not only are they more accurate but you also don't need to stick your phone inside of your grow house...
https://www.amazon.de/Beslands-Lichtmes ... 07T23MJTQ/
Best.
Re: Rate my setup
I'd be interested in hearing your experiences with your light meter. I had a rather low opinion of them as people have posted about some which IMO clearly don't work. But I would be curious to hear what you have to say because they're all different and the phone apps have clear limitationsFrom0to10in2weeks wrote: ↑Sun Mar 21, 2021 8:30 am [...]But my recommendation is to buy a cheap lux meter instead of a phone app. Not only are they more accurate but you also don't need to stick your phone inside of your grow house[...]
I'll share my experiences with using phone apps. My opinion is that they are very accurate. However, they are also highly directional. What I mean is the phone must be perpendicular to the incoming light to get a good reading. So on the balance they are really only accurate in situations with a single light source and be considered to be approximate in other situations. I've also had trouble measuring light level under shade cloth with my phone
Los Angeles, California (USA)
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
- From0to10in2weeks
- Posts: 185
- Joined: Tue Jun 30, 2020 11:45 am
- Location: Berlin, Germany
Re: Rate my setup
I am not sure why you think that light meters won't work accurately. Sure there might be faulty units and/or with poor calibrations out there. But it's a decades old method and uses a diffuser to avoid directionality problems. And the photodiode used to detect the light is probably much simpler and larger than the image sensor of your phone. The lack of a diffuser and the comparatively narrow "field of view" make IMO and experience the phone apps much less reproducible. Besides, I like having the detector in the grow house under realistic conditions and keep the display unit outside in my hand.Shane wrote: ↑Sun Mar 21, 2021 9:00 pm I'd be interested in hearing your experiences with your light meter. I had a rather low opinion of them as people have posted about some which IMO clearly don't work. But I would be curious to hear what you have to say because they're all different and the phone apps have clear limitations
I'll share my experiences with using phone apps. My opinion is that they are very accurate. However, they are also highly directional. What I mean is the phone must be perpendicular to the incoming light to get a good reading. So on the balance they are really only accurate in situations with a single light source and be considered to be approximate in other situations. I've also had trouble measuring light level under shade cloth with my phone
For reference, I measured the illumination from a new LED bulb with known output (800 lumen) and illumination diameter (25 cm) at a given distance (30 cm). And it matched what I calculate from the above info.
We had a sunny morning with high clouds diffusing the light today. Around 11 am I measured 36,000 lux behind a double panelled SE-facing window with eglazing. Sounds about right. Note, Berlin is with respect to latitude halfway between Edmonton and Calgary in Canada...
Best.