I’m guessing that was typo, I kind of doubt by the look of the pictures that you have a box longer than a football field.
Looking at the pictures of the box, I’m going to try and run some numbers based on the guess your space is actually 100 cm x 96.5 cm. And maybe approximately 100 cm tall?
100 cm x 96.5 cm = 10.387 sq ft
So let’s just say 10 square feet.
What kind of lights are the 85 watt lights?
You could add the LED light to your current lights during flower, but that 24 watt led light certainly will not be enough alone.
85 + 24 = 109 watts
10 sq ft x 50 watts = 500 watts
Sounds like you could get away with a MH or HPS or CMH around at least 400 watts for flowering, but you will have to deal with some heat and figure out how to get rid of that heat.
A quality top of the line LED can maybe get away with quite a bit less electricity for that area, maybe getting away with as low as about 250 watts, but even with the LED light @tdubwilly posted above you’ll probably want a bit higher wattage than 250 actual consumed watts, maybe closer to that 400 watt mark with a average grade LED light.
How close the light is to the plant is also a consideration. You can get away with a little less watts by moving the light very close, but again you need to also watch out for not letting it get too close and the light-fixture itself being too hot if too close.
And finally, I wasn’t sure if you said you have all autoflowers or not?
Are you asking if the LED light being added will trigger the autos to flower? No, probably not.
They will normally start to flower when they reach a certain age, maybe around a month to two months, and maybe even longer.
And even with the same auto-flower strain, you may have other factors or stresses that will trigger flowering in a auto more than adding the led light.
One example is getting root bound. The size of the container can cause a auto plant to flower earlier than it might otherwise have.
happy growing,
MacG