Aero-Gro Academy · Module 03
Grow Light Course | PAR, PPFD & DLI Explained
Give Them Energy.
“Plants don’t eat fertilizer. They eat light.
— Andrew Woodward
Choose, position, and measure grow lights with confidence using PAR, PPFD, and DLI — the numbers professionals actually use.
- ★★★★★ Professional Training
- HD Lessons
- Downloadable Workbook
- Build Mission
- Certificate Progress
- Lifetime Updates
Instant digital access · Lifetime updates · Part of the full Aero-Gro Academy
What You’ll Learn
- How plants use light to grow
- PAR, PPFD, and DLI explained simply
- Choosing the right grow light
- Measuring and positioning your lights
- Matching light to each growth stage
Lessons Included
- 1How Plants Use Light
- 2Understanding PAR
- 3Understanding PPFD
- 4Understanding DLI
- 5Choosing a Grow Light
- 6Positioning & Measuring
- 7Build Mission
- 8Knowledge Review
Mission Illuminate
Measure & Tune Your Light
Measure your grow lights, adjust their height and intensity, record PAR, and calculate DLI. Then watch how your plants respond over the next week — and document the change.
Complete the mission, earn your badge, and move to the next module.
Mission Equipment & Downloads
- Lighting Workbook
- PAR/PPFD/DLI Reference Charts
- Grow Light Buying Guide
- Light Placement Worksheet
Meet Your Instructor
Andrew Woodward
Founder of Aero-Gro · 30 years of growing, engineering & water science
Andrew’s expertise spans growing, engineering, water quality, and automation — so the Academy doesn’t just teach techniques. It teaches a complete way of thinking about indoor growing.
Frequently Asked Questions
What is PAR?
Photosynthetically Active Radiation — the slice of light plants actually use to grow.
What is DLI?
Daily Light Integral — the total amount of usable light a plant receives in a day. It’s how you size a light to a crop.
Do I need an expensive light?
No. Once you understand PAR, PPFD, and DLI, you can match an affordable light to your goals.
Student Outcome
You’ll be able to choose the right grow light, position it correctly, and measure DLI so your plants get exactly the energy they need.
Recommended With This Module
Begin Module 03
Learn it. Build it. Grow it. Start now and become the confident indoor grower you’ve always wanted to be.