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The Best Grow Light Spectrum for Tomatoes
Barrina Research Program

The Best Grow Light Spectrum for Tomatoes

A Five-Spectrum Growth Trial Abstract We grew the same dwarf tomato under five grow-light spectra for 23 days (22 April–15 May 2026) and measured canopy width and height. A balanced white spectrum ...
Grow Lights for Carnivorous Plants
Barrina Research Program

Grow Lights for Carnivorous Plants

A Four-Level PPFD Trial on Butterwort (Pinguicula) Abstract We grew a butterwort (Pinguicula) across four light levels: 82, 133, 267, and 533 PPFD for 23 days while holding spectrum constant. The b...
I Grew 12 Houseplants Under 4 Light Levels for 3 Months. Here's the Setup.

I Grew 12 Houseplants Under 4 Light Levels for 3 Months. Here's the Setup.

Everyone argues about grow-light spectrum. But the setting that usually decides whether a plant thrives or fries on your shelf is intensity — so I tested it properly, from Echeveria to Caladium to...
The Brightness Map: Which Houseplants Belong Under Your Strongest Light

The Brightness Map: Which Houseplants Belong Under Your Strongest Light

After three months under four controlled light levels, 12 species sorted themselves into three clear groups. Here's the cheat-sheet for where each one belongs on your shelf.The experiment: 12 speci...
Your Echeveria Wants It Blasting: Compact Rosettes and Pink Stress Color

Your Echeveria Wants It Blasting: Compact Rosettes and Pink Stress Color

Both succulents barely changed width in three months — but that's not the story. The real signal is in their height and their color.The experiment: 12 species · 4 intensity levels · ~3 monthsUnits:...
The Shade-Lovers' Ceiling: Where Caladiums and Alocasias Burn

The Shade-Lovers' Ceiling: Where Caladiums and Alocasias Burn

These jungle-floor plants grew best at the dimmest settings I tested — and actively shrank when the light got strong.The experiment: 12 species · 4 intensity levels · ~3 monthsUnits: PPFD (µmol/m²/...
The Fussy Ones: A Butterwort's Sweet Spot and a Staghorn's Stretch

The Fussy Ones: A Butterwort's Sweet Spot and a Staghorn's Stretch

A carnivore with one clear optimum — and a fern whose "best" result comes with an asterisk.The experiment: 12 species · 4 intensity levels · ~3 monthsUnits: PPFD (µmol/m²/s)Two of the trickier plan...
Same Brightness, Different Color: A Spectrum Test on Dwarf Tomato

Same Brightness, Different Color: A Spectrum Test on Dwarf Tomato

One bonus experiment changed the light's color instead of its intensity. Red-rich light grew the tallest plants; a hemp full-spectrum grew the most compact.The experiment: 12 species · 4 intensity ...
How Much Light Do Foliage Houseplants Need?
Barrina Research Program

How Much Light Do Foliage Houseplants Need?

A Four-Level PPFD Trial on Anthurium Barrina Grow Light Research · June 2026 Abstract We grew Anthurium across four light levels: 82, 133, 267, and 533 PPFD (approximately 5,000–32,000 lux) for 23 ...