Lighting Physics
13 articles
Diffusion vs. Direct Light: Reducing Hotspots in Small Grow Tents
Growing in a 2×2, 3×3, or 4×4-foot tent creates distinct optical challenges. In these confined spaces,…
Why Your “Full Spectrum” LED is Causing Bleaching (And How to Fix It)
Modern “full spectrum” white LED grow lights deliver high photon densities with minimal radiant heat. However,…
Light Leak Logic: How Tiny Gaps Affect Flowering Indoor Crops
A light leak is any unwanted illumination entering an indoor grow space during a plant’s scheduled…
Green Light for Night Work: How to Inspect Your Plants During “Dark Cycles”
Entering an indoor grow room during an uninterrupted dark cycle risks disrupting critical plant photoperiods. For…
DIY Grow Light Movers: Maximizing Coverage Without Buying More Fixtures
In a compact indoor garden, buying additional lighting fixtures often introduces more problems than it solves:…
The Cost of Light: Calculating Electricity Usage per Square Foot of Canopy
Calculating the electricity cost of your indoor grow light per square foot of canopy comes down…
COB vs. SMD LEDs: Which Chip Tech is Most Efficient for Small Spaces?
Choosing between Chip-on-Board (COB) and Surface-Mounted Device (SMD) LEDs comes down to how light and heat…
Photoperiod Mastery: Why 18/6 Isn’t Always the Answer for Indoor Veggies
Applying a blanket 18-hour light and 6-hour dark schedule (18/6) to every indoor vegetable crop is…
Optimal Grow Light Distance Chart: Seedling vs. Vegetative vs. Flowering
Improper grow light hanging distance can quickly destroy an entire indoor harvest. Hanging fixtures too close…
Far-Red and UV Lighting: Do Your Indoor Herbs Actually Need Them?
Indoor herb growers frequently question whether standard commercial grow lights are sufficient or if adding specialized…
How to Read an LED Grow Light Spectrograph (The 2026 Buyer’s Guide)
Buying a grow light based purely on a manufacturer’s marketing copy puts your entire indoor harvest…
Understanding PAR vs. PPFD: Why Lumens Are Obsolete for Indoor Gardening
When tender indoor herbs like basil or microgreens begin stretching, growing pale, or dropping leaves despite…