This chart refers to the “Daily Light Integral” which requires taking readings of your light output. There is an app called “Photone” that may be helpful but never used it.
How many plants were you wanting to run and how big is the space?
You have some time before filling up your grow space so here’s what I’d do:
Run one light over sprouts set at 50% and 12" above. If that won’t light up all the sprouts, raise light and set at 100%. A heat mat is helpful too and I run sprouts on a 24/0 light schedule.
As plants get bigger (I use Solo cups full of coco—DON’T use potting soil!) you can start adding lights for coverage.
Those three lights combined will do a great job of one plant and a half-ass job on two plants. Adequate light is needed to properly fill in flower bulk. Otherwise you will have loose, airy flower.
How about some particulars of your proposed grow so the community can help:
COPY/PASTE the below list into your forum post.
Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so; Or post
NA (non applicable)
-What strain, Seed bank, or bag seed (photo or auto)
-Age of plant
-Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
-Vessels: Type and capacity of container (fabric, plastic, etc)
-PH and TDS of Water, Solution, runoff (if Applicable)
-PPM/TDS or EC of nutrient solution if applicable
-Method used to measure PH and TDS
-Indoor or Outdoor if indoor, size of grow space
-Light system List brand and wattage/spectrum
-Actual wattage draw of lights
-Current Light Schedule
-Temps; Day, Night
-Humidity; Day, Night
-Ventilation system; Yes, No, Size
-AC, Humidifier, De-humidifier,
-Co2; Yes, No
If growing Hydro some additional questions:
-DWC? RDWC? Autopots? Ebb and Flow? Other?
-Distance of liquid below net pot (DWC)
-Temperature of reservoir
-TDS of nutrient solution
-Amount of air to solution
Always try to upload a clear picture in white light of any issues you may have to allow the community to assist you.
Here is my journal if interested: