Practical guides and reference material for choosing and operating a grow light.
Buying Guides
- How to read a spec sheet — PPF, PPFD, efficacy, and the numbers that actually matter.
- Sizing your light to your tent — use the Grow Logic Calculator on the home page for a one-click answer.
- LED vs HPS vs CMH — when to pick each technology.
- Watts vs PPF — why “equivalent wattage” is a marketing trick.
Calculators
- Grow Logic Calculator — estimate PPF and recommended wattage for your room.