Sun is good, but has limitations It has UV, which stresses out the cells You can't PWM the sun, it's hard to get full naked coverage in front of it. Doesn't pe

Sun is good, but has limitations It has UV, which stresses out the cells You can't PWM the sun, it's hard to get full naked coverage in front of it. Doesn't perfectly target NIR or NIR-II biological windows. But for a base/starter, it can't be beat. Simply put, light is better than no light.