Here's another picture of the top
Actually 24/0 plants tend to grow shorter and with less internode space. At least that's what I've read.Easy turbo it takes about 45 days for a seed to show its sex. I veg under 18 hours of light and 6 hours of darkness. I have tried both ways and the most notable difference is the 24 hour light makes the plant use more cal/mag. Other than that they seem to grow the same but you save electricity with the dark period.
Between those I would do 20/4. Weed doesn't really need a dark period until flower. Marijuana is a C3 plant which means it uses light and CO2 for photosynthesis. During the light phase two reactions happen (I forget the names) and during the dark only one does.Im thinking about going to 18/6 or 20/4 i was going to induce new light cycle next week 21-23 days in veg stage???