What are the best LED grow lights? - Plant type & Spectrum (1/5)
If you want to know what the best LED grow lights are? Well, that depends on many factors. We will guided you understand the world of LED grow lights and increase your knowledge before you buy that special lights for your precious grow.
PLANT TYPE AND PHASE
Low light VS high light conditions
Do the plants need full sun or low-light conditions? Dimmable LED lights may be the way to go for adjusting PAR intensity. Dimmable LEDs (such as Kind LED K5 series, Lifted LED, Illumitex, Simulight, Eonstar) also allow you to vary the light output without adjusting the height of the light and allow you to mimic seasonal light changes that some plants require.
Vegging VS Flowering
Are you vegging, flowering, or both? There are LED lights for growing that are designed specifically for vegging your plants (blue spectrum lights) and LEDs for flowering your plants (red spectrum lights). Light fixtures with these specific spectrums may also be used in addition to full spectrum LED grow lights or other types of grow lighting to provide an extra boost during veg and bloom phases of your grow. G8LED offers a red booster for that extra flowering boost.
Red and Blue light are crucial
If you would like to grow from seedling to flower, then a full-cycle LED grow light is recommended. A full-cycle grow light will provide your plants with the blue and red wavelengths that are needed for optimal growth. Blue light mimics the long day, summer sun and encourages vegetative leaf growth (MH, or Metal Halide, lamps also provide this function). When choosing a LED grow light ensure the unit includes blue lights in the range of 440-470nm. Red light is also important in plant growth. Red light takes the place of the short day, autumn sun. When combined with blue light, a hormone cascade is created and the red wavelengths begin to encourage flowering. Look for lights that have the red light in the 640-660 range.
UV is a Supercharger
In addition to red and blue diodes, you may consider a light that contains UV wavelengths. UV light activates the plant's defense mechanisms, affects plant development, growth, and metabolism. UV wavelengths can also increase active constituent in medical plants. Choose LED grow lights that have diodes in the 315-400nm range (380nm is common.)
Some LED grow lights are designed with white LED dioes such as the Diamond Series (Philips Luxeon diodes) by Lil' Tomato Concepts (LTC), NextLight's Mega LED Grow Light (below), and Pro MAX Grow lights. Quality white LEDs, adjusted for the correct wavelengths and color temperature, provide full-spectrum white light. Make sure that the color of the LEDs are in a mid-temperature range. 5500K is a nicely balanced cool/warm color that will provide the blues need for growth and the reds required for flowering.
The best LED spectums for plant growth
In summary, the best lights for growing herb and any other crop will include red and blue LEDs or a full-spectrum white light. UV diodes may be included to enhance a plant's physiological functions, but these are not required. A 6:1 or 5:1 ratio of red to blue is ideal. Most, if not all LED lights on the market today already contain the correct ratio and spectrum, so you do not have to worry about this.
CONSTRUCTION UNIT HOUSING High-quality LED grow lights are made with a metal housing. If the unit is plastic do not purchase it. Aluminium is an excellent heat conductor and helps transfer excess heat that is produced by the LEDs. DRIVER Look for grow lights that contain a "constant-c ...
LUMENS AND PAR LUMENS ARE FOR HUMANS You may have seen LED grow light information listed in Lumens and PAR. Lumens do not matter - at least not to a plant. Lumens are a measure of the amount of visible light emitted from a source. Chlorophyll mostly absorbs light in the blue range, red range, and far ranges of the visible spectrum. Chlorophyll does not absorb green or yellow wavelengths (although evidence suggests that green light helps drive photosynthesis) ...
COVERAGE AREA LIGHT SIZE The grow light that you choose should depend on how many areas you want to cover. A small 100 watt light may cover 4 sq ft, while a large 400 watt light can cover up to 20 sq ft. Some growers recommend purchasing a larger light because it is cheaper (watt for watt) and they can always back the light off from the plants if the light radiation is too intense. However, this will also reduce the PA ...
ACTUAL LED OUTPUT WATTAGE Comparing LED grow light power When comparing LED lights to HID lighting (HPS/MH), use the actual LED output wattage. To get an equal amount of photosynthetic active radiation from LEDs as you would HID lighting, use about 50-75% less wattage than a HID setup. For example, to get 1000 watts of actual LED power you could use 2 LED panels that draw 500 watts of power in place of a 1500-2000 watt HID system. These numbers represent a wide range, and the actual power will differ depending on the brand, diod ...