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6 Misunderstandings About Led Plant Growth Lights
- Aug 31, 2018 -

Myth 1: Lumens = photosynthesis

Lumens is a suitable method to measure the number of indoor horticultural myths at all times of light produced by plant growth lamps. Measuring light

Lumens are used for photosynthesis, just plain stupidity. Let us know: how many light human eyes are lumens (scientific symbol: LM)

Perceptual measurement. It does not measure the light that drives photosynthesis in any way. period. Simply put, lumens measure human visible light

The total amount from a particular source.

The evolution of the same light in plants and humans comes from the sun. But humans and plants use this light very differently. Most used by humans

More than 400 nanometers and 700 nanometers in the "visible range", but our eyes are focused on 500-600nm, frequency

The spectrum is mostly green and yellow. Plants have a completely different reaction light, paying attention to their absorption around 400nm -500 nm (blue) and 600 nm-700 nm (red). They also absorb some of the ultraviolet light in the visible spectrum

The rest of the infrared band as well as non-visible light.

Measuring the light output of lumen growth is an artifact of the lighting industry itself. Because the manufacturers of light bulbs mainly focus on lighting for humans

Said that they will publish lumens of light specifications. Some countries require bulbs to be rated for lumen output. Indoor gardeners use this side

The method is used to measure the brightness of its growing lamp, as it is generally available from the lamp manufacturer (at least until the indicator light comes to the site).

When it comes to courtyard lighting, it's time to stop thinking about it and start thinking about Light Quantum Flux Density (PPFD), which describes

The density at which a photon reaches a particular area. The unit of PPFD is "micromolar (micromolar) per metre per second", which is used for

Light plants receive a more useful measurement than lumens. You need a quantum flux meter to measure the energy of photosynthetically active light.

The amount is actually reaching your plant. When testing LED plant growth lights, be sure to pick a quantum flux meter designed for LEDs.

Design, or your measurements will be turned off. Unfortunately, these devices are very expensive.


Myth 2: Summer and winter, all seasons


A respected garden writer recently wrote one of the most popular indoor gardening magazines: "In [high-pressure sodium light is very red,

And imitated the autumn sun to induce flowering. HID lamp sales staff and water shop owners also claim that MH lights are the best nutrition

Growing because they are "blue" like spring sunshine, while high pressure sodium lamps are the best flowers because they are like "red" falling

light.

This is the second most widely held horticultural misunderstanding: between the seasons when the color of the sun changes dramatically, this color shift induces

flower. Ask yourself: At noon, do you look at the blue in the spring or the autumn day?

The "color" of light is determined according to the ratio of Kelvin (K) to blue with a higher value and a lower red portion. Look at this world

It's weird, if the light temperature of the sun is anything, even close to the difference between MH and HPS lights 2000-2500

K from the season of season change. Don't get me wrong: there is a seasonal shift in the color of the sun, because the sun's light has before reaching the earth

The depth through the atmosphere. However, this shift is small, 300-500K depends on where you live, this is a difference between these

It is difficult to detect the human eye.

On the other hand, daylight color definitely shifts over time of day. The sun starts at about 2000K (orange) in the morning and climbs above 5

000K (white) at noon, then back to the sunset of 2000K or lower. The color temperature of the daylight sky can climb up to 8,000

- 10,000K (blue), on a sunny summer afternoon.

Why is this happening? As indoor gardeners are taught, changing from "spring blue" to "falling red" will promote flowering - in other words

In other words, it will lead to the transfer of plants from the vegetative growth stage to their own flowering period. This belief may be how HID lights find their side

The effect of entering the downstream of the indoor garden. Initially, only MH lights were available, and using them to grow is an experienced result... indeed

set. Then, high pressure sodium lamps were introduced, and who tried their gardener found that these new lights significantly improved the harvest

weight. Some people speculate that MH is better for vegetative growth, and the high-pressure sodium lamp is good, and the myth is born. It has become a mainstream

"Facts": Pick up any magazines distributed in hydroponic stores and you will find it. This does not mean that it is true.

Many gardeners use only one type of HID lamp for their entire growth, including MH, HPS and CMH lamps. All these gardens

Ding has any trouble, from the nutrition "flip" their garden to produce mushrooms / flowering. They are just the time of change, the light that the light is turned on

The length of the cycle. Plants are sensitive to long flowers, and when their photoperiod changes, the light they receive changes can't be color.

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Myth 3: 90-watt LED light can replace 400-600 watt HID lamp


Oh, how did you miss out on the fun of the LED plant growing lights at the beginning! When LED plant growth lights were first introduced, many manufacturers

Boldly claim that a 90-watt LED plant grows a 400- or 600-watt HID. These statements are ridiculous

They are still ridiculous. LED plant growth lamp manufacturers are often over-enthusiastic with their claims that they "certify

Ming", made up of growing small ice or lettuce instead of light hungry crops (such as tomatoes, cucumbers, herbs, or flowers)

The gardener generally prefer.Testing revealed that these early "90 watt" units actually only painted 54-56 watts of power on the wall,

average. With a few watts of cooling fans on the power board, these lamps actually produce less available light than 75-100 watts of high pressure sodium

The lamp, without any proximity to the 400- or 600-watt HID performance claims its manufacturer.

At least the industry seems to have learned the lesson. These days, most LED plant growth lamp manufacturers provide realistic rated power

And coverage is recommended for their lights. This combination is better, more powerful LEDs and more efficient light design is helping to end this

myth. It would be ideal for LED plant grow lamp manufacturers to announce their lamp power micromolar at set height intervals so

We, their customers, can decide how many HIDs they can give themselves. These lights can replace us in the face of our garden.

Situation.



Myth 4: LEDs produce little or no heat

Next, the most common sales of LED plant growth lights are that they produce almost no heat. When the manufacturer claims LED implants

The growth lamp produces almost no heat, which makes it difficult for experienced gardeners to take more photos of a manufacturer’s use.

sheet.

Of course, LED plant growth lamps produce less heat than HID growth lamps, but there is still heat and heat needs to be managed. See yourself: Garden

Immediately after the LED temperature LED is removed, the growth light is turned off, just like a HID garden. No heat no way!


Myth 5: LED lights won't burn plants


One of the biggest misconceptions about LED plant growth lights is that they don't burn plants, no matter how close they are.

For plants. This myth is based on the relatively low heat output of light and the idea that "the more photons, the better." Early LEDs

Growing lights, with their low output, can be positioned close to the plant - as a fluorescent light, in some cases. Today's high power single

Bits can easily exceed the concentration limit for plants.

When the male is too close to the factory, the LED plant growth lamp can cause photooxidation or "photobleaching". When this happens, more

The light absorption ratio can be treated by plants. The plants are closest to those parts of the light that are often the biggest flowers, unfortunately -

White because their chlorophyll is destroyed. LED and HID plant growth lamps can be used improperly in bleaching plants, but the problem is with H

IDs are not common because their high heat output usually causes the gardener to light up and eliminate the threat.

Myth 6: Blue light increases nutrition, red light is limited to flowering


Just after their introduction, some LED companies are only investing in blue vegetative growth, only red light blooms. There are also on the market

Some lights make this statement. With the myth of "90 watts = 400/600 watts", this method may be suitable for low light crops,

Such as wheat grass, but the light love factory needs a more complete spectrum of normal growth