Fat Banana 2022

I flushed the biobizz light mix (8l fabric pot) with double amount of plain water before placing the seedling in. I've grown fay banana auto last year and she grew much faster, in a much smaller pot (2.5l) If anyone knows some tricks to speed this grow up, i would really appreciate, because I need to go on a business trip November 19th 😳 Because last year's grow finished so fast i thought it would be ok, bit now i k ow what people mean when they talk about autos being inconsistent. Also my mistakes didn't help i guess. Im also bit unsure how to use the Hans panel 180. I thought at first i should keep my little girl super close it it so she won't stretch. My grow box is only 35x35x65cm(!) I had her about 10cm from the light and was playing with different light settings. Yesterday the leaves turned slightly yellow, so i did some research and decided to place the pot directly on the floor. Now the distance ist aprox 25cm from light. I could move the light up, i still have about 18 cm space above the light. I got the lux app, and put the hals panel dial so it's at 7000lux. Any advice is welcome :)