How high should grow lights be above seedlings?
Move the lamp upward as the seedlings grow; you want to keep the lights about 2-4 inches above the plants.
Do grow lights dry out plants?
Plants grown under lights indoors dry out much faster than outdoor plants in the sun. Keep an eye on the heat level.
Do plants need day/night cycle?
Plants, shrubs and trees use sunlight for photosynthesis during the daytime, but at night they need darkness to regenerate a key compound - phytochrome. Nighttime lighting can reduce vegetation's ability to properly create this compound.
What color grow light is best for tomatoes?
Tomatoes need red light in larger quantities than blue light. Although it carries less energy than blue light, red light is used more efficiently by plants. So, all fruiting plants, including tomatoes, need an abundance of red light during their flowering phase.
Will tomatoes ripen under grow lights?
A. No. Light is not required for ripening and it will actually make the skins harder. The heat will cause the tomatoes to ripen too quickly, and if they become to warm they will rot.
Where is the best place to put grow light?
In general, you'll want to hang your light no more than 12" away from your plants. - Remember: after 12" fluorescent lighting loses its power, so make sure you don't raise it any more than 12" above your canopy otherwise your plants aren't getting light energy.
Can you burn leaves with a grow light?
You can burn your plants – regardless of what they are – with grow lights. But it's usually not the light intensity that does the burning. Rather, grow lights that emit a lot of heat, and if placed too close to the plants, can cause photo-bleaching and even burn the leaves.