Led Grow Light Key Features 3

Question 1

Far-red light (around 730 nm) is most known for influencing which plant response?

Accepted Answer

Flowering and stem elongation via the Emerson effect

Answer

Chlorophyll bleaching

Answer

Root rot prevention

Answer

Leaf calcium uptake

Question 2

Why do many growers favor white-LED-based full-spectrum lights over old blurple (blue/red) panels?

Accepted Answer

Better spectrum balance and easier plant inspection

Answer

They use far more electricity

Answer

They emit no heat at all

Answer

They eliminate the need for nutrients

Question 3

What does a fixture's IP65 rating indicate?

Accepted Answer

Protection against dust and water jets

Answer

Higher photon efficacy

Answer

A specific color temperature

Answer

A dimming protocol

Question 4

Color temperature of 3000K versus 5000K mainly differs in what way?

Accepted Answer

3000K is warmer/redder, 5000K is cooler/bluer

Answer

3000K uses more watts

Answer

5000K blocks UV

Answer

They have identical spectra

Question 5

A passive heat-sink design on an LED grow light primarily helps with what?

Accepted Answer

Cooling without fans, improving reliability and quiet operation

Answer

Increasing PPFD by 50%

Answer

Adding UV output

Answer

Reducing the light's footprint

Question 6

Which feature allows multiple fixtures to be controlled together from one dimmer?

Accepted Answer

Daisy-chain / master controller port

Answer

A USB charging port

Answer

A built-in timer battery

Answer

An RGB mood mode

Question 7

Adding supplemental UV-A to a grow light is sometimes used to encourage what?

Accepted Answer

Increased resin/secondary metabolite production

Answer

Faster water evaporation

Answer

Lower energy bills

Answer

Suppressed flowering