For seedlings to grow best, use a grow light that gives a mix of cool blue and warm red colors.The blue light helps seedlings stay short and sturdy, with strong stems and lots of leaves.The red light helps the roots grow big and strong, giving the seedlings energy to grow...

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...