Outdoor Grapefruit but inside, sue me

Measurements were took on the 2021-01-17. Very smooth week with really nothing to say. The light is set at 50% to decrease the heat it outputs and I just lowered it closer to the plants so they still get all the light they need, a 1000, of what? Lumen, Lux, foot-candle? I don't know the meter doesn't specify, but a 1000 and she doesn't show any signs of light burn so I'll keep it in that range. We're still feeding with plain tap water for now. Week breakdown: 2021-01-17 through 2021-01-22: Nothing to read. Plant just keeps on growing. 2021-01-23: Noticeable color change: darker and looks healthier.