You've got grow lights, your plants, all of you full specturm led grow light and everything you need to grow.
Hanging your lights too low can burn your plants, but hanging them too high can leave them stretched and weak Some grow lights need to be hung far away from plants so they don't get bleached, but some lights are too weak to hang more than 10 inches away- so what do you do?
The trick is to hang your lights right in that sweet spot effectiveness and safety.The distance of your lights to your plants is all about getting your plants the power they need to turn nutrients into food for growth. So before we start talking numbers, let’s talk about the idea behind hanging your grow lights:
While standard fluorescent grow lights like T5s and CFLs really don’t produce enough light to overload your plants, powerful lights like HPS, LECs and LEDs can do so with ease. Although LED, LEC and HPS grow lights can produce the biggest yields and most potent buds of all grow lights, they need to be used correctly to get those results!
You get bigger yields and more potent buds by using powerful grow lights and keeping them just the right distance away from your plants
By positioning grow lights the right distance from your plants, you’ll create the highest levels of light your cannabis plants can use. Put your buds in this “sweet spot” light level zone, and they’ll reward you!

Notice with these plants how all the top buds are big, while the lower buds are smaller. You want to keep samsung 301h led grow light close, because buds closest to the grow light get the biggest.

More light is better when it comes to yields, but unfortunately that’s only up to a point. Although it may be tempting to keep trying to move grow lights closer and closer, your plants simply can’t use more light past a certain point!
In fact, if you keep your lights too close to your cannabis plants, you’ll see bleaching, yellow leaves and nutrient deficiencies, so it’s important to find a balance!
Each type of light needs to be kept a different distance away, so if you feel confused, this tutorial will show you how far to keep your grow light so you get incredible results every time, no matter what your setup!
Metal Halide lights are well-suited to the vegetative stage and tend to encourage plants to grow short and squat though they are less electrically efficient than HPS. HPS lights are suitable for both the vegetative and flowering stage of cannabis growth and the light they give off encourages plants to quickly grow tall and produce big buds. Despite these differences, MH and HPS bulbs need to be kept about the same distance away from your plants. The proper distance actually depends on the size/wattage of your lamp.
How Far To Place LED Lights From Plants In Each Stage Of Growth
Once again, it is important to understand that there is no universal rule for how far to place LED lights from plants in each phase of growth. Different manufacturers construct their LED lights in different ways. There are multiple details to take into consideration, such as the power and angle of individual LED diodes samsung 301b stripwithin a fixture and the use of lenses to reflect light downwards. The best way to get that perfect distance between the light and your canopy is to consult with the manufacturer.

The second thing to keep in mind is that the correct LED light placement changes for each stage of growth. If your LED is dimmable, you can use dimming to adjust the intensity of the light on the plant surface. If your LED is not dimmable, your only option is to change the hanging height. These examples aren’t hard-and-fast rules, so don’t follow them without the blessing of your light’s manufacturer. But just to give you a ballpark sense of what LED light placement generally looks like throughout the growth cycle:
LED Light Placement For Seedling Stage
Seedlings need the least intensity and most distance between the canopy and the lights. You may have the instinct to blast these little guys with high-intensity light to promote fast growth. The truth is, they’re young, vulnerable, and likelier to thrive with a gentler approach.
Vegetative Stage
In the vegetative stage, you want to get your quantum board 125wcloser to your plants. In general, plants in veg only need about half the light that they need in bloom. It follows that you could have up to twice the hanging height that you use in bloom.
Flowering Stage
It’s in the flowering stage that you really need the highest intensity. It is important to build in a “hardening off” phase as you move from veg to bloom. Slowly increase the intensity or lower the hanging height until you reach the manufacturers recommended height in bloom.
Again, these are general guidelines. Discuss the ideal distances with your manufacturer and keep an eye on your plants for signs that you’re overloading them. If your plants are getting too much light intensity, they’ll let you know. Here’s how:
How to Recognize Light Burn On Your Plants
Because LED lights give off so little heat, you don’t run much risk of causing heat damage by placing your fixture too close to the canopy. What you do risk is light burn. Unfortunately, the light burn is easily mistaken for nitrogen deficiency, and many growers wind up misdiagnosing their grow and addressing the wrong problem.
If your plants have light damage, you’ll see symptoms such as:
Leaves point upwards.
Bleaching, which takes the form of white or yellow discoloration, typically on the leaves closest to the light.
Veins remain green even as the rest of the leaves turn yellow.
A nitrogen deficiency has similar characteristics, but there are a few notable differences.
A plant with a nitrogen deficiency also develops yellow patches, but the damage starts from the bottom of the plant and works its way up, while light burn begins at the top, closest to the lights.
In the case of a nitrogen deficiency, leaves wilt. In the case of a light burn, leaves turn upward and sometimes even become brittle.
The leaves of a nitrogen deficient plant fall off on their own. This does not happen to plants suffering from a light burn.
If it sounds like your plant has a light burn, it’s time to reevaluate the placement of your LED lights.