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Excelent video thank you for everything
Thanks for this excellent presentation. There’s a lot of light info being used incorrectly in advertising and in light packaging that’s confusing, misleading, and usually results in an expenditure of limited pocket cash towards the wrong choice of light. I have to confess to being one of those types at one time in the past.
It’s this kind of information, well presented and explained that benefits the gardening community. No pseudo “Farsebook” Science here.
Thanks again for another outstanding presentation!!
Thank you!! Great information!! Appreciate you taking the time to do this😊
Hi Professor.
I am Edgar.
Can you advice on how many hours of light per day? It is proporcional to intensety or nonproporcional?
Can you make video?
I usually have lights on for 10 hours.
Thanks.
Have been seeking the right led blend for a grow. The light strip I’m thinking of using has the same spectrogram image you use at 6:11 in your vid. On a spectrometer/chart, the Y axis goes from zero to 1. Is the 1 benchmarked by the sun? Additionally someone alluded that intensity of parts of a given spectrum might be lacking in density? that has me turned around. Is that true? Light within a spectrogram has different intensities? I would think thats reflected on the charts Y axis. Hope to hear from you, thanks.
The 1 on the spectra is meaningless. The image is just a relative value and tells you noting about intensity. for that you need to look at the PPFD value.
@Garden Fundamentals I see.. Thanks.
Hi there and thank you for the great video! I was looking for your thoughts or comments on a dollar store grow light. It seems to advertise a lot of the factors that you identify in your video. It’s for a single grapefruit tree that I have grown from seed in Northern Ontario – I don’t get sun in my home during the winter and the leaves are looking quite lack-luster. Its made it to a full 7.5 feet in height (after 8 years), but hasn’t flowered at all.
An 8 foot tree needs a large light – I doubt a dollar store light will do it.
hello, the video is very interesting. I have read several scientific articles (published on the ResearchGate website) about strawberry growing, the conclusion is that strawberry plants under blue light only, produce more flowers and strawberries than under other color or full spectrum. How can we explain this?
thank you
Ps: I tried to add the link to this study, but my comment disappeared!
I’m sorry if you said it in the video and I missed it, but you say “Blurple”, a combination of red and blue light, is actually best for the plants but less desirable for us because it doesn’t look so good, will the addition of green light alone produce the more appealing white light, or would you still need to add other colors for that? And thanks a million for your great and easy to understand videos and internet articles!
Adding green will help, but you also want some reds and oranges.
Folks, he says at the 0:30 mark that “if you just want a quick answer, head for the time stamp 8:46 . There, he says, he will “summarize his suggestions”. (he actually says the 9 30 stamp, but I think 8:46 is a better starting point for the summary)
you are fabulous. you just explained all of it and gave me the result I need in 10 minutes. Thank you so much
Wow great video sir thank you 😁👍🌱🌻🌵🍀🌼🌷🌹🌷🍄
simple and excellent information of lights tobe used in agri fields
Excellent information! I started looking for plants light and had no idea what to look for. This should help me avoid some costly mistakes.
Thanks for all the useful info for noobies ☺️
There is too much on Growers mind already . Who cares for all of those college degree words. Hydro Farm Radiant 8 is the way to go. By all parameters it is the closest thing to sunlight light . Get 450 to 1050 true watts out of the same light. Either vented or not vented, Dimmable or 4 position power selector models are available. LED lighting has very limited light spectrum, and plants are very sensitive to color of light while HPS lighting provides full spectrum and 2 x 2 ft light reflectors of Radiant 8 cover area of 4 by 4 ft ( or even more) of growth area. Contact me and I will tell how to get pre-owned sets.