Instead of the $50 light, get a Vipar XS-1500 Pro for about $90.
As soon as I saw your plants, it was either you've hacked off all of the leaves (growers love it, plants suffer) or the plants weren't getting enough light.
You've mainlined the plant and, in doing so, you've removed a lot of leaves. Leaves are the only way that plants can make food.
When plants don't get a lot of light, they stretch toward the light (tall and slender), they have a small number of branches, and a small number of large leaves. That happens because plants need light to create food and, when there's no that much light, they need to do all they can to get to the light.
In the first photo, the plants are "praying" which usually indicates that they're getting a good amount of light. Based on their morphology, that wasn't always the case.
What light are you using and what's your hang height?
Is $90 for a kickass light in your budget?
I have the XS-1500 which was a nice little light. Vipar brought out the Pro model over a year ago and it set the standard in the 2' market.
Adding more light now will make a difference in yield. As long as your plants can tolerate the additional light (and cannabis is a light whore loves light) crop yield and quality increase in an almost linear manner as light levels increase. Getting that light now will give you benefits for this grow.
