5 Reasons Why LED Grow Lights Are Gaining In Popularity

In recent years Light Emitting Diode (LED) Grow Lights have undergone some significant advances in technology offering more choices for indoor gardeners. Some growers now consider LED grow lights for sale to offer significant advantages over the more commonly used Higher Intensity Discharge (HID) grow lights and in this article we consider why this is the case.

With a lifespan averaging between 50-100,000 hours and an energy cost around 40-50% lower than HID lights, LED grow lights are a more cost effective (and environmentally friendly) choice of grow light. On average a high pressure sodium light (which, along with metal halide lights and mercury vapor lights, are a type of HID light) will have a much shorter life span of around 5,000 hours

Light is used by plants for photosynthesis and is vital for growing, flowering, sprouting and seeding. But not all visible light is absorbed by plants. Studies have shown four main absorption points in the electromagnetic spectrum, two at red/orange wavelengths and two at blue/purple wavelengths. A key advantage of LED grow lights is that they can be designed to emit light at the precise wavelengths to match these absorption points. With HID lights, around 2/3 of the light emitted is not put to use by plants. Only 1/3 is absorbed and used in photosynthesis.

While HID lights emit a great deal of energy as heat, LED grow lights have a much lower heat signature. This brings with it certain advantages including a reduced need for air conditioning or heat extraction fans, less need for watering and lower risk of scorching. With LED lights it is possible to place the light closer to the plants than would be possible with a HID light. This allows for a higher intensity of light to be shone on the plants as well as a bulb with lower wattage.

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