2026-05-27
You see a grow light on Amazon: “1000W, High PAR, Best for Cannabis.”
You buy it. Your plants? They stretch, they fade, they disappoint.
Here’s the cold truth: that 1000W number is fake. What actually drives growth is how many usable photons hit your leaves every second.
Meet the three real specs you should care about: PPF, PPFD, and PPE.
And no, they’re not just for lab nerds. Once you get them, you’ll never waste money on a junk light again.
