Your plant looks like it needs some water. A refridgerator is an intresting choice for a grow cab. However, I would suggest you measure the temperature constantly. You don't want the temp to be too cold. It is quite innovative though, you have less fear of overheating and because of this you can probably add more lights than you could with a uncooled grow cab. This could be very intresting to see grow.

Happy Toking :rasta: