LED growlights

Main > Food and Agriculture > Controlled-environment growing

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Advantages: Researchers report approximately 40% yield win from using LED lights^[1]. They use about a tenth the energy of high-pressure sodium lights.

Life: LEDs last about 50,000 hours. Plants grow best with 16 hours light a day - that's 16 hours total sunlight + LED light. The amount of sunlight obviously varies depending on climate and latitude, but if you lived in a cave, you'd be using the growlights 16 × 365 hours a year: 5840 hours a year so they'd last 8.5 years. Factoring in sunlight, they should last at least 20 years.

Color: Plants need a mixture of blue (wavelength of 458nm) and red lights (wavelength of 640nm), at a ratio of about two red LEDs to each blue LED.

Commercial growlights vs DIY: This is a commercial growpanel with 225 LEDs for $34 plus shipping. It may be cheaper to just get bulk loose LEDs from Alibaba or a similar site. We need to research this.

Large High-Output LED Array for Plant Growth slidshow by orbitech [2]