Led Grow LED Grow Light Setup & Installation

Question 1

What is the recommended minimum hanging height for a 600W LED grow light above cannabis plants in the vegetative stage?

Accepted Answer

24-36 inches

Answer

Most 600W LED grow lights should be hung 24-36 inches above plants during veg to avoid light burn and ensure even coverage.

Question 2

What is the purpose of using a light mover or light rail in an indoor grow room?

Accepted Answer

To evenly distribute light across the canopy and eliminate hot spots

Answer

Light movers/rails move lights back and forth to distribute PAR more evenly across the canopy, eliminating hotspots and shadows.

Question 3

When daisy-chaining LED grow lights, what is the most important safety consideration?

Accepted Answer

Total amperage draw must not exceed the circuit breaker rating

Answer

The combined amperage draw of all daisy-chained lights must stay within the circuit's rated capacity to prevent overload and fire risk.

Question 4

What does a PAR meter (quantum meter) measure in a grow room?

Accepted Answer

The photon flux density (PPFD) at specific canopy points

Answer

A PAR/quantum meter measures PPFD — the number of photons in the PAR range hitting a surface per second per square meter.

Question 5

What is the primary reason growers use reflective mylar or white paint on grow room walls?

Accepted Answer

To reflect light back onto plants, increasing effective PPFD

Answer

Reflective surfaces bounce stray light back toward the plants, increasing the effective PPFD reaching the canopy without additional electricity.

Led Grow Practice Test