@jakethedog, you can still increase light period, but in flowering do it in low steps. I believe 20-30 minutes daily will be ok. It can do some stress, so be careful. This distance and 20hours of light can cause light burn on top leaves, so watch your lady daily and do not more "upgrades" together (adding much more water or much more nutrients, temperature a humidity are very important too. Look at VPD chart for autoflowers) Another idea, but dont know if it works with 60Β° bulb, is add some reflective walls around for transport light beam do lower leaves. With this upgrade dont forget add small fan, for circulating air and prevent molds. I think your plant grow is slowed down too, because of low temp. But let it so now. More light in future=more heat. Dont know where are you growing, but usually strong lights can increase room temp...
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