How do we measure light?

Visible light is part of the larger electromagnetic scale which includes invisible spectrums such as radio waves and x rays. Each spectrum represents an electromagnetic frequency measured in nanometers (one billionth of a meter):

Do plants use all light spectrums produced by the sun?

Most indoor growers seem to believe that the best indoor grow lights would have the same light spectrum as the sun – a relatively full spectrum over the visible light frequencies. After all, plants evolved over millions of years to best convert light energy into carbohydrates and sugars. The most readily available light from the sun is in the middle part of the spectrum which we see as green, yellow and orange. These are the primary frequencies that human eyes use. However, studies show that these are the least used light frequencies in plants. Most of the photosynthetic activity is in the blue and red frequencies.

The main reason for this counter-intuitive use of light by plants seems to be related to early forms of bacteria and the evolution of photosynthesis. Photosynthesis first evolved in bacteria over millions of years in the primordial sea. This evolved in bacteria long before the appearance of more complex leafy plants. These early photosynthetic bacteria extensively used the yellow, green and orange middle spectrums for photosynthesis which tended to filter out these light spectrums for plants evolving at lower levels in the ocean. As more complex plants evolved at lower levels they were left with only the non-filtered spectrums not used by bacteria – mostly in the red and blue frequencies. The yellow, green and orange light is mostly reflected off the surface of the leaves and this is why photosynthesizing plants are green

Do different light spectrums do different work in plants?

Not only do plants focus on specific light spectrums for photosynthesis but different light spectrums are used for different types of growth in plants. There are millions of photosynthetic receptors in a leaf of a green plant. Each receptor includes specialized pigments that absorb specific frequencies during photosynthesis. By measuring the amount of oxygen produced under various light spectrums we can measure the amount of photosynthetic activity under each light spectrum. This has produced a very detailed map of which light spectrum is related to which type of plant growth.

FAQ of Sunritek custom rohs led grow light 300w

Q: What is the MOQ of your product?
A: MOQ is 1pcs, and you can mix different models in one order.

Q: What is your payment terms and lead time?
A: We accept T/T/, West Union and Paypal for small orders. Lead time for samples is 3 working days, and for volume order is 7-10 working days.

Q: Why should I choose Sunritek product?
A: Sunritek has over 15 years experience in led lighting. Our led lights have outstanding structure design, and use first-class LEDs + drivers + core components. We have very strict quality management system to keep extremely low failure rate, lower than other suppliers.

Q: What certificates do you have for your lights?
A: Our led lights have got UL CUL DLC CE TUV RoHS FCC PSE LM79 LM80 certifications.

Q: Can I have my company logo print on the lights?
A: Yes, we can laser print your company logo and item No. on the lights for free.

Q: How do you keep your warranty?
A: We give 5 years warranty for all lights. Within the warranty period, we can send you replacement light/accessory for free, not caused by human-made misoperation. Longer warranty such as 10 years is also negotiable in our company.