What is happening
@dcat0921. A p150 should light up that sized space quite well. The core coverage area on the p150 is 3'x1.5'. The panels (especially the p150) all run cooler than many other LEDs on the market. You just need to make sure to allow airflow to the vents.
The height of the available space may be a concern, depending on what you are growing. We recommend 24" from the canopy for Veg and 18" for Bloom.