Autoflowers/Light/Mars Hydro FC-e6500

This article answers that question and gives an awesome graph of DLI recommendations by week: https://growlightmeter.com/autoflowering-cannabis-lighting/ Here is a calculator to convert PPFD to DLI: https://www.waveformlighting.com/horticulture/daily-light-integral-dli-calculator Happy growing!

Specific to your context: You have a 5x4 tent = 20sq ft. 18h operation starting point range: 20 x 70 x .67 = 938 20 x 80 x .67 = 1072 Call it 950-1100 umol/s produced at diode with reflective walls and orthodox hanging distances. FCE-6500 claims 2044umol/S 1100 / 2044 = about 54%. So, yes, 50% would be a good starting point. You still need to observe and adjust no matter what you choose. In the end the plant and environment together dictate maximum DLI you can give. ------------------------- Why... (or, learn to fish for yourself) It's the same concepts and doesn't really change. You start around the same DLI and you allow the plant's growth to dictate adjustments for your local variables. How much any plant can handle per day without hurting itself depends on several variables, therefore how much light you give will inevitably be different than how much someone else can provide, safely. PPFD is only half the equation. That's like miles per hour (a rate alone is not entirely useful). That needs to be multipled by hours of operation (simplified). DLI tables can be found with a simple google image search for reference. Start somwhere around 35-40 DLI (ambient co2 conditions) and adjust based on plant growth -- too lanky? add more. too tight? reduce. Simple after that. If your temps, rh and atmospheric co2 remain consistent throughout the year, you can use the same settings and hanging distance. Otherwise, go through the same observe and adjust process for each seasonal change... take notes so you only have to do it once. Very minimal adjustments may be needed after that, unless you ahve some sort of professional lab control over your climate :P 12h operation, maybe 70-80umol/s per sq ft (umol/s at diode and orthodox hanging distance) 18h operation 67% of that rate needed to get to same DLI. 16h operation 75% of that rate needed to get to same DLI. You can multiply that by 10.764 to get PPFD. (10.764ft^2 / 1m^2 onversion) DLI is what matters. DLI is what needs to jive with your climate and atmospheric co2 to avoid damaging a plant. if you stick to standard hours of operation, you'll get just as familiar with your specific umol/s needs from light (at diode). There is little to no difference with autoflowers compared to photoperiods except for how it switches to flower phase. No matter how good a suggestion is in regard to light intensity, you absolutely will have to make some minor adjsutments based on local variables. It may even take several weeks to see any symptoms of too much light.

Tudo bem amigo? As suas Auto estão em qual semana?

What they said. Hit your DLI. There's a good amount of DLI charts. One of the ones I refer to that seems to be alright is https://growlightmeter.com/lighting-requirements-of-cannabis-over-the-full-grow-cycle/ Each plant is different, some can handle more, some less.

Hi growmie, You should see the perfect DLI for each phase of the plant, it doesn't matter if it is an auto or a photo. This is a calculation of the PPFD versus the amount of hours that your light is on. Usually for each phase you can use DLI for seedling - 15/20; ealry veg - 20/40; late veg - 30/40; early bloom - 40/44; full bloom - 35/40; rippening - 25/35 The idea is to simulate the amount of light through all the grow cicle. This are rederence values you can allways push it harder, specially if you have CO2. You can use the photon app to measure the PPFD and DLI through out the grow. You can reach for this information on the buildasoil website on the education menu, environment conditions. I hope it helped =) Wish you good harvests

Also autoflower ist wie jede Pflanze. Wenn du mit einer 18 Stunde Licht Phase die Genügende DLI erreichst dann reichen 18 Stunden, bei meinen Lampen reicht wenn ich sie dann auf 80% laufen lassen. Du kannst die DLI mit einer app messen die heißt Photone. Hier ein paar Richtwerte Keimlingsphase: 100–300 μmol/m²/s – Ähnlich wie bei Photoperioden-Pflanzen ist sanftes Licht ideal für junge Pflanzen. Das sind 10 bis 15 DLi Vegetative Phase: 300–500 μmol/m²/s – Da Autoflowers eine kürzere vegetative Phase haben, reicht ein etwas niedrigerer Wert als bei herkömmlichen Pflanzen aus. So 30 bis 40 DLI sind hier ok Blütephase: 500–750 μmol/m²/s – Autoflowers bevorzugen in der Blütephase oft geringfügig niedrigere PPFD-Werte als Photoperioden-Pflanzen hier kann mann da auf bis zu 45 gehen. Das sind Werte die ich verwende und bei mir funktioniert es gut

Well I’d start the plants just the same as photo plants. Depending on the strain of autos some go into flower right after being a seedling and some wait a few weeks so you really have to be on the lookout for the plant starting the stretch. When it starts to stretch slowly increase lighting. Then when you see flowers start to develop go back to the same amount of light you do for a photo i give them 20hrs of light during veg and 18hrs durring flower if you have a weak light you can give 20 or 22 hrs of light with some strains. Autos and very much random their not my cup of tea sometimes you get big plants some times you get mini plants