Led Grow Light Guide 3

Question 1

What color temperature (Kelvin) is generally considered best for the vegetative stage?

Accepted Answer

5000-6500K (cooler/bluish)

Answer

Cooler 5000-6500K light favors leafy vegetative growth.

Question 2

A 'full-spectrum' LED grow light is designed to do what?

Accepted Answer

Emit a broad balanced range mimicking sunlight

Answer

Full-spectrum LEDs deliver a balanced range of wavelengths similar to natural sunlight.

Question 3

Why is green light often considered less useful but not useless for plants?

Accepted Answer

Plants reflect much of it but it penetrates deeper into the canopy

Answer

Green light is partly reflected yet penetrates deeper to drive lower-canopy photosynthesis.

Question 4

What is the typical recommended photoperiod for many flowering plants under LED?

Accepted Answer

12 hours on, 12 hours off

Answer

A 12/12 light cycle commonly triggers and sustains flowering in photoperiod plants.

Question 5

What role does far-red light (730 nm) play via the Emerson effect?

Accepted Answer

It boosts photosynthesis efficiency when combined with red light

Answer

Far-red combined with red light enhances photosynthetic efficiency, known as the Emerson enhancement effect.

Led Grow Practice Test