Question: Can Grow Lights Stay On 24 Hours A Day?

Can you leave grow lights on 24 hours a day for tomatoes?

Scientists have found a gene in wild tomatoes that enables farmed tomato plants to be grown 24 hours a day under natural and artificial light, boosting yields by up to 20 per cent.

As a result, commercial tomatoes have to be grown under a day-night cycle in which light is limited to around 16 hours a day..

Do grow lights give off radiation?

Working in an enclosed, heated space could create the possibility of heat stroke. Note that LED grow light arrays with heat sinks create a different burn risk; if you touch the heat sink while the light is on, you could be burned, as well. LEDs do not put out harmful radiation.

Do plants need to rest at night?

So, do plants sleep? I posed the question to several plant experts and the short answer is no, at least not in the literal sense. … But plants do have circadian rhythms tuned to Earth’s 24-hour light-dark cycle, which they maintain even if they’re kept in light fulltime, just as we do.

How far should my grow light be?

12-30 inchesIn general, LED grow lights should be 12-30 inches from the tops of plants. As plants grow, you’ll adjust your lights to maintain a consistent distance from the plants.

Why are grow lights purple?

The purple color emitted by LED lights is caused by the combination of blue and red wavelengths of light that make up most LEDs. Studies show that these two wavelengths are critical in plant development, which is why manufacturers use multiple red and blue wavelengths in their grow lights.

Is it OK to leave a grow light on all the time?

A: In general, you should not leave grow lights on 24/7. Plants need a light-dark cycle to develop properly. It’s believed that they truly do “rest” during periods of darkness, and probably use this time to move nutrients into their extremities while taking a break from growing.

Can plant grow lights cause cancer?

Over-exposure to UV light is widely known to cause skin cancer, premature aging, immune system suppression, and eye damage. What many workers and employers in cannabis growing don’t know, is that they may be exposed to harmful amounts of UV light on the job. … Light bulbs!

Do grow lights affect humans?

At a high enough intensity, any type of light, regardless of the source has the potential to harm the eyes or skin through prolonged thermal exposure or photochemical effects of ultraviolet, blue light &/or infrared emissions. … Higher concentration light sources will provide more direct energy and a higher risk.

Do plants grow faster under 24 hours of light?

While some plants need a certain amount of darkness to bloom, others crave light. Exposure to 24-hour light helps some plants like orchids (Orchidaceae spp.) and cacti (Cactaceae spp.) bloom more quickly than they normally would if grown outdoors.

How many hours a day should grow lights be on?

16 hoursAs a general rule of thumb, most vegetables and flowering plants need 12 to 16 hours of light per day, with flowering plants at the top end of that range. Plan on giving most plants at least 8 hours of darkness per day. Darkness is actually very important for the plant growth cycle.

Is it bad to look at LED grow lights?

The LED lights are very concentrated and can damage your eyes. … Never look directly into LEDs and wear sunglasses. The bottom line is that LED grow lights are no more dangerous than any other type of grow light.

How long do grow lights need to be on?

14 to 18 hoursLong-day plants require 14 to 18 hours of light each day. Most seedlings for vegetables and garden flowers are long-day plants. When they don’t receive enough light they get pale and leggy.

Can you leave grow lights on 24 hours a day?

To produce a profusion of blooms, the plant needs to go without darkness and be exposed to light 24 hours a day. However, too much light can disturb the natural process of its various plant cycles such as growth, flowering, fruit, and dormancy. … In fact, the grow light should never be left on for 24 hours.

Can plants get too much LED light?

The reality is that modern LED grow lights can produce a very high level of light and it can cause photo-bleaching and burn leaves. This depends very much on the plant, but a PPFD of 800 is enough to damage some plants.

Is it bad to leave lights on for days?

Leaving your LED lights on all day isn’t quite as costly, but it’ll still cause a significant dent in your annual energy bill. 45 LED lights left on while you’re at work will cost you an extra $180 a year. That means, if you flip those switches off when you leave, you could save enough for an annual gym membership.