Grow lights should be kept fairly close to seedlings, but not too close or they will burn the delicate young seedlings. The optimal spectrum for seedling growth is one rich in blue wavelengths, which promote strong, compact growth.For LED grow lights, start with the lights about 2-2.5 feet (60-75 cm) above...

A good starting point is providing around 15-20 watts per square foot of growing area for the seedlings. So if you have a 2x2 ft grow area, you'd want a grow light in the 60-80 watt range positioned above it.As the seedlings develop their first set of true leaves after...

Contrary to popular belief, you don't need complete darkness to grow cannabis indoors. New research shows that cannabis is sensitive to light pollution, but not as sensitive as previously thought. The safe limit for light pollution during flowering is 10 nanomoles or lower. This means even a full moon's glow...