At 24 days old they should have alot more growth on them. I'm subbed, curious what the solution to this will be.
I'm guessing they need more light/you putting light closer to them.
did you get the Y adapters that you screw into the light socket you get two light sockets? that would be your cheapest way to add the bulbs to the current fixtures, with the current bulbs too. just a suggestion, but glad you got some more light.