Why choose LED grow light instead of other grow light?
We all know plants need light to grow and be healthy. Indoor plants often suffer from too little sun and can benefit from artificial light. Most lighting options today feature LEDs due to their long life and low energy use. But should you use full spectrum LED grow lights to grow plants? The traditional grow lights were fluorescent or incandescent. Let’s see Why choose LED grow light instead of other grow light ?
Let’s compare the HPS lights with LED grow lights.
HPS (High Pressure Sodium)：
First, HPS is an acronym for “High Pressure Sodium”. This gas discharge lamp is so named because it produces a higher internal pressure than its sister “low pressure sodium” bulb. Each of these grow lights has a cylindrical aluminum-based “arc lamp” that contains a mixture of chemicals like xenon, mercury, and sodium. When you turn on an HPS lamp, a high-intensity voltage pulse is created between the electrodes of the arc lamp, which “releases” the gas and produces light. Additionally, HPS grow lights are equipped with ballasts to help adjust the amount of voltage required to ignite the arc lamps.
LED (Light Emitting Diode)：
LEDs refer to “Light Emitting Diodes,” which are tiny semiconductors that convert electrical current into visible light. Unlike gas discharge HPS, LEDs are “solid-state” products because light is generated between the two electrodes of each “solid-state” diode.
It’s worth mentioning that each LED may have a different “band gap,” which changes the number of photons that pass through each diode. These different band gaps help explain why LED grow lights have multiple spectra.
Why are LED grow lights better ?
Because HPS lights last longer than LED lights, many still consider them the gold standard for indoor growing. However, even HPS proponents have to admit that LEDs solve many of the inefficiencies of this older model. Let’s take a look at some of the common benefits associated with the use of LED grow lights to treat cannabis.
Full spectrum wavelength array:
In terms of spectrum, HPS can’t compare with LED grow lights. When you use HPS lights, you are simply exposing the plants to a monochromatic warm yellow pattern with a correlated color temperature of 2200K. However, LEDs are available in a variety of colors from 2200K to 6000K. While manufacturers can produce LEDs with specific light frequencies (such as “blur” or UV), full-spectrum LEDs are available in a variety of colors. To date, full-spectrum LEDs like Mars Hydro have been used exclusively for growing cannabis, which means they have higher yields than HPS.
As mentioned earlier, HPS grow lights are equipped with ballasts to help adjust the amount of voltage required to ignite the arc lamps. Over time, the HPS lamp required higher voltages to produce the same amount of light, until it eventually ran out after about 24,000 hours. Additionally, HPS grow lights tend to flicker at the end of their life cycle.
In contrast, LED diodes do not decay as fast as the light grown by HPS. This is because LEDs do not require high concentrations of gas, which inevitably “burn out” quickly. And they generate far less heat, ensuring that the core chips take longer to die. Most LED grow lights have a lifespan between 50,000 and 100,000 hours.
Another problem with using HPS grow lights is that they release a lot of heat. In fact, HPS lights generate so much heat that growers need to invest more in cooling technology and extra water. The excess heat from these lamps can also pose a safety hazard, especially if you have to replace those bulbs or ballasts.
With LED grow lights, you don’t have to worry about managing excess ambient heat in your growing space. In fact, most LEDs emit only about 25% of the radiant heat compared to 50% for HPS lamps. You can rest assured that most of the energy going into the LED is converted into light, not heat.
Concentration direction of photons：
Not only do HPS lights have a weaker light output due to their heat consumption, they also don’t produce as concentrated light as LED grow lights. Due to the inefficient design of HPS lamps, light waves are scattered 360° in your growing space.
In contrast, LED lights focus light at 180°, making it easier for plants to absorb all those photons for photosynthesis. You can further enhance this light when you order LEDs with built-in reflectors, like those in the Mars Hydro catalog.
So under LED, your yield will be much higher and more uniform than HPS.
How choose an inexpensive LED grow light to ensure it will be effective?
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ECO Farm ECOZ Series 250W/510W/700W/1000W Samsung LM301H Chips LED Grow Light Strips With Separately UV+IR Control
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LED grow lights are more energy efficient. They produce the same amount of light as HPS lights, but consume far less energy. LED grow lights do not generate as much heat as HPS lights, so no additional ventilation or airflow system is required.