Led Grow Light Guide 4

Question 1

What does the abbreviation 'PAR' stand for?

Accepted Answer

Photosynthetically Active Radiation

Answer

Plant Absorption Rate

Answer

Photon Average Range

Answer

Peak Ambient Radiation

Question 2

Which measurement is misleading for evaluating grow lights because it reflects human eye sensitivity?

Accepted Answer

Lumens/Lux

Answer

PPFD

Answer

DLI

Answer

PAR

Question 3

Why do many LED grow lights appear pinkish or purple?

Accepted Answer

They blend separate red and blue diodes

Answer

They use only green diodes

Answer

They emit pure white light

Answer

They use infrared only

Question 4

What is the benefit of light uniformity (even coverage) across the grow area?

Accepted Answer

Consistent growth and yield across all plants

Answer

Brighter center only

Answer

Lower total wattage needed always

Answer

It prevents flowering

Question 5

Increasing CO2 levels in a sealed grow room allows plants to use what?

Accepted Answer

Higher light intensities effectively

Answer

Less light overall

Answer

No light at all

Answer

Only blue light

Question 6

What is the typical lifespan rating advantage of quality LED grow lights?

Accepted Answer

50,000+ hours of operation

Answer

500 hours

Answer

Around 1,000 hours like incandescent

Answer

Unlimited with no degradation

Question 7

What does the 'inverse square law' mean for grow light placement?

Accepted Answer

Intensity drops sharply as distance from the light increases

Answer

Light gets stronger farther away

Answer

Distance has no effect

Answer

Color changes with distance