- LED’s produce low amounts of heat so they will not burn your plants. You can choose to move the lights closer to the plants. Closer lights means more light getting to your plants at a higher intensity.
- Low Heat means less heat stress for your plants which ensure maximum fruit, flower and bud production.
- Low heat produced by the LED lights also means less ventilation and lower air conditioning bills. Watch and adjust your room temperatures as you start using LED lamps.
- LED’s produce the exact bandwidths plants need to grow, flower and produce fruit. Three colors are key to growth which are blue, orange and red at a ratio of 1:1:7 respectively. This technology was originally developed by NASA for use on space missions so the Astronauts could efficiently grow food.
- LED grow lights provide your garden the same amount of usable light and use about a third of the electricity. A 600 watt commercial series LED grow light is equal to about 1600 to 1800 watts of HID lighting. This same light only uses 5 amps to produce that amount of light. A 1000 HID light in comparison uses 15 amps of electricity.
- If you are feeding your plants on a regular schedule with a high quality fertilizer be prepared to tweak fertilizer levels because of the lower stress and heat levels. Plants will use less nutrients for better results.
Being knowledgeable about your LED Grow Light.
- Hang your light in a safe fashion. Use quality hooks and parts to attached into building structure.
- Do not get your light wet. Similar to all other lights water is not your friend.
- Read the instructions and send in your warranty card (or do it online).
- Use a quality light timer rated correctly for the size light(s) you are using.
- Use a surge protector on your light. Rare surges in power lines can happen.
- LED’s can be used for shorter photo periods in some cases. Plants need darkness and rest to grow the next day.
- Do not obstruct ventilation openings on the LED Grow Light. Let it breathe.
- Keep your light(s) clean and occasionally check your fans for dust. Canned air is helpful.
One of the most commonly used terms when referring to the power of a given grow light is the word lumens. For years, it has been the standard measurement of the growing capability of metal halide and high pressure sodium grow lights. The problem is that this term has been used incorrectly for over 30 years. In this article, we will explore the real meaning and correct use of lumens and further describe what you should be looking for when it comes to choosing LED grow lights that pack the most growing-power for your dollar.
What are Lumens and Lux
Lumens and lux are both measurements popular with grow light manufacturers – both HID and LED – to give potential customer a reference point for the relative brightness of various lights. In some jurisdictions, a lamp’s lumen output rating must be on the label as required by law. What we are told (and have been for years) is that the higher the lumen rating of a given light, the better, faster, bigger, etc. your plants will grow.
But there is one MAJOR problem with using Lumens as a reference point for growing plants.
By definition, a lumen is a measurement of how bright (the power) a light is perceived by the human eye. The term lux is very similar to lumen in that it measures the intensity of light, however, it also takes into account the total area covered by a given number of lumens. For now, don’t get bogged down by the technical side, just know that lux and lumen both measure the intensity of light to the human eye.
So what’s the big deal? A bright light is good, right? The sun does a pretty good job at growing things and it’s really bright. Don’t we want to mimic the sun?
Well, yes and no . . .
Lumen & Lux Are Irrelevant To Plant Growth
Unless the plants under your grow lights have eyes, lumens & lux make zero difference in how well your plants grow. Plants respond most efficiently to light that is beyond what humans can perceive so it does not necessarily matter how bright your light is. As a matter of fact, 80% or more of the light emitted by either the sun or from HID lights, goes unused by plants for photosynthesis. It is that portion of light that we humans see with our eyes and can register as being bright.
Cannabis needs certain conditions to flourish.
Soil is required, except for cannabis grown with hydroponics
Sufficient nutrients—commercial soil bags usually indicate this as “N-P-K = x%-y%-z%” the percentages of the fundamental nutritional elements, i.e., Nitrogen, Phosphorus and Potassium. Nutrients are often provided to the soil via fertilizers but such practice requires caution.
pH between 6.0 and 7.0. This value can be adjusted – see soil pH. Commercial fertilizers (even organic) almost always make the soil more acidic (decrease its pH).
The optimal day temperature range for cannabis is 24 to 30 °C (75 to 86 F). Temperatures above 31 °C and below 15.5 °C seem to decrease THC potency and slow growth. At 13 °C the plant undergoes a mild shock, though some strains withstand frost temporarily.
Light can be natural (outdoor growing) or artificial (indoor growing).
When artificial light is used, from the germination until the flowering stage, the plant typically remains under a regime of 16–20 hours of light and 4–8 hours of darkness, although the plant can use a full 24 hours of light without harm. When the plant reaches the flowering stage the regime is typically switched to 12 hours of light and 12 hours of darkness.
Watering frequency and amount is determined by many factors, including temperature and light, the age, size and stage of growth of the plant and the medium’s texture. A conspicuous sign of water problems is the downward wilting of leaves. Too much water can kill young cannabis plants. Plants are occasionally sprayed with water to fend off under-watering in small steps.
Fertilizer burn on a leaf
Nutrients are the food of plants and come in the form of fertilizers that can be chemical or organic, liquid or powder and may contain several elements (see also: fertilizer). Commercial fertilizers must indicate the levels of NPK (mentioned above). During the vegetative stage, cannabis needs more N than P and K, while during the flowering stage, P is more essential than N and K. The presence of secondary nutrients (calcium, magnesium, sulfur) is recommended. Also there are seven micro nutrients (Iron, boron, chlorine, manganese, copper, zinc, molybdenum) that are not extremely important and rarely manifest as deficiencies.
Fertilizers are vital for good cannabis growth but must be used frugally to avoid burning the plant. As a general rule, half the amount suggested in a bottle may be given each time.
Because cannabis is acclimatized to virtually every growing region on Earth, its nutrient needs vary widely with its genetics and can truly only be determined with experience. Chemical plant foods vary greatly maker to maker, and some can be used at full strength, or the strength listed for plants with large fruits like the tomato.
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Advantage of the weekly electronic timer:
Display with LCD.
Daily and weekly program.
Min time interval: 1 minute.
- 200 – 280 nm UVC ultraviolet range which is extremely harmful to plants because it is highly toxic.
- 280 – 315 nm Includes harmful UVB ultraviolet light which causes plants colors to fade.
- 315 – 380 nm Range of UVA ultraviolet light which is neither harmful nor beneficial to plant growth.
- 380 – 400 nm Start of visible light spectrum. Process of chlorophyll absorption begins. UV protected plastics ideally block out any light below this range.
- 400 – 520 nm This range includes violet, blue, and green bands. Peak absorption by chlorophyll occurs, and a strong influence on photosynthesis. (promotes vegetative growth)
- 520 – 610 nm This range includes the green, yellow, and orange bands and has less absorption by pigments.
- 610 – 720 nm This is the red band. Large amount of absorption by chlorophyll occurs, and most significant influence on photosynthesis. (promotes flowering and budding)
- 720 – 1000 nm There is little absorption by chlorophyll here. Flowering and germination is influenced. At the high end of the band is infrared, which is heat.
- 1000+ nm
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