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many studies use LEDs because they are a cheap and easy way to produce monochromatic light. the in leave action spectrum is very similar to the graph I posted with a little less absoption in the uv range so not all the uv absorbed is used to convert CO2 into sugar.(photosynthesis) some of the...

this test report appears to indicate 14% radient effeiciency in the par range and an L.E.R of 100 for this spectrum file:///C:/Users/mauri/Downloads/Downloads/testing%20reports%20for%20full%20spectrum%20100w%20LED.pdf modern 3 watt diodes with the same SPD produve between 38-44LPW.if the ler...

do you have any ideal how expensive and inefficient some of those diodes are? using 3000k white leds may te a better way to cover the 550nm-660nmrange

I flip when they get 12 inches tall. i grow an 8 plant sog in a 2ft by 4 ft tent. I get shorter veg times and higher yeilds than I got with a 2 plant scrog and a lot less work

with T5s plants stay short and bushy in veg. I'm interested in it's affect on flavor and potency. and to determine if an LED can replace a UV tube in this application. in the past I've used 660nm diodes to add deep red to my T5s before 660nm plant bulbs became more affordable. i have also been...

you are going to upset a lot of people who love LEDs. I grew with them and needed to add supplemental lighting to get good resin production. it may be called bro science by some but HPS produces higher yields while MH.CMH AND T5s produce better quality and slightly lower yields. LEDs are an...

did you ever watch ice road truckers? they drive 40 ton rigs on ice

just get a 600 watt MH/HPS and grow like the big commercial growers do...

there are sme questions science can not answer. it xan only address cause and effect relationships (deterministic relationships) it can not explain non- deterministic or first cause events . steven hawkins addressed the question by creating parallel universes where the laws of physics are...

they look good. be patient. they will mature when they are ready to

has anyone tried these...

thats what it looks like however UVA leds are less efficient than 301 diodes. these have an efficiency of 20%. 301s are close to 60% https://www.ebay.com/itm/10x-LG-3W-3535-SMD-Ultra-Violet-UV-365nm-370nm-High-Power-LED-DC-3-4-4V-700ma/223290539700?var=522073754035 so you need 10-12...

false claims are common among LED makers. I question the life expectancy when high end LEDs lose 5-8% of their output in 6000hr if they were really better than other lights than why do they lie so much https://www.hydroexperts.com.au/buying/resource-library/grow-lights/epistar-vs-cree-led/

LEDs and hydro may seem cool but they are more demanding and increase a new growers chance of failure CMH or a MH/HPS grow light don't need extra nutrients or a lot of extra work. a new grower has a high risk of failure.no reason to increase that risk.

K.I.S.S 3ft by 3ft tent 315 cmh good potting soil and high quality feminized seeds. no training. just try to make it thru to harvest

we are all learning here.in the 6 years I've been growing I've made more than my share of mistakes but I've learned from them and became a better grower.their are a lot of people here who are happy to help you. your title reminded me of a T12 closet grow I did in 75. I really knew nothing back...

I buy seeds from a reputable breeder to insure high quality feminized seeds I don't have the room to grow males or low quality plants so I start with the best seeds I can get

many growers fail wiyh teir first attempt. don't give up.keep it simple and learn from your mistakes. you may need better seeds. I purchased seeds from a california seed bank and most of them did not sprout. the ones that did sprout grew poorly so I went back to buying from nirvana and got good...

been looking into UVA and found this https://www.frontiersin.org/articles/10.3389/fpls.2019.01563/full seems 90% of the benefit only requires 4% UVA. I know UVA diodes are expensive and inefficient but a small price to pay for the improvement in yield. I could not find 365nm LG3535's but the...

unfortunately you can't rely on claims and data provided by LED makers and it is difficult to find accurate information. their still claiming a 130 watt LED can replace a 1000 watt HPS and that plants don't light that LEDs can't produce efficiently like violet and UV. seems like your left with...