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

2000-2700K (warm/red)

Answer

1000K

Answer

10000K only

Question 2

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

Accepted Answer

Emit a broad balanced range mimicking sunlight

Answer

Emit only green light

Answer

Emit only UV

Answer

Emit infrared only

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

Plants cannot detect it at all

Answer

It only heats the leaves

Answer

It kills chlorophyll

Question 4

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

Accepted Answer

12 hours on, 12 hours off

Answer

24 hours on

Answer

2 hours on, 22 off

Answer

6 on, 6 off

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

It stops all growth

Answer

It only causes heat damage

Answer

It replaces water needs

Question 6

If plants are stretching tall with long gaps between nodes, what light issue is likely?

Accepted Answer

Insufficient intensity or light too far away

Answer

Light is too intense

Answer

Too much blue spectrum

Answer

Perfect light conditions

Question 7

What is the main purpose of a dimmable LED grow light feature?

Accepted Answer

Adjust intensity for different growth stages and seedlings

Answer

Change the WiFi password

Answer

Increase heat output

Answer

Disable the red diodes permanently