Frequently Asked Questions
How much light do my plants need?
This depends heavily on the type of plant and can range 60 µmols (micromol) for low light requiring microgreens and 1000 µmols for flowering and fruiting plants.
- 60-120 µmols is best for microgreens
- 200-350 µmols is best for leafy greens and herbs
- 350-650 µmols is best for high light requiring herbs and flowering crops in their vegetative stage
- 650-1000 µmols is best for plants in their flowering stage, or fruiting plants in their flowering or fruiting stage
Receiving too much light can be detrimental too. Too much light can cause plants like lettuce to bolt (this is when they send up their flower stalk and the plant goes to seed) which makes it taste bitter and the leaves tougher. Too much light can also damage or burn plants.
For the scientist in you, a µmol (pronounced “micromol”) is a way to measure the amount of a substance, which in this case would be the number of photons passing through a target area. One µmol of light equals just over 62 quadrillion photons.
What is the difference between LEDs and fluorescent grow lights?
- LEDs can be made in specific wavelengths to deliver exactly what a plant requires for photosynthesis.
- More controllable. You can adjust spectrum and intensity.
- Easier to clean inside your grow machine.
- More durable than fluorescent grow lights.
- Very long lasting. They can last over 10 years in your grow machine.
- More energy efficient
Fluorescent Grow Lights
- Most commonly used are the T5 diameter high-output (HO) grow lights
- Do not handle dimming well and come in a specific spectrum.
- You have to be very careful while cleaning fluorescent grow lights.
- They have a shorter life.
- Higher energy costs
- Contain toxic mercury