With regard to plants, UV-B impairs photosynthesis in many species. Overexposure to UV-B reduces size, productivity, and quality in many of the crop plant species that have been studied (among them, many varieties of rice, soybeans, winter wheat, cotton, and corn).

LED lights are more energy efficient and emit much lower levels of heat than other types of lighting. But can you use any led lights to grow plants? Generally, yes. White light contains a great mix for plants, so white LED bulbs will work to grow.

Oscillations in leaf turgor pressure were synchronized with stomatal oscillations and balanced only when transpiration equaled water supply. Blue light is known to induce stomatal opening and thus should increase the hydraulic mismatch, reduce the VPD threshold for oscillations and increase the oscillation amplitude.

Infrared light is even used to heat food sometimes – special lamps that emit thermal infrared waves are often used in fast food restaurants! Shorter, near infrared waves are not hot at all – in fact you cannot even feel them. These shorter wavelengths are the ones used by your TV’s remote control.

IR, particularly IR-A or near IR [700nm-1400nm], raises the internal temperature of the eye, essentially “baking” it. Medical studies indicate that prolonged IR exposure can lead to lens, cornea and retina damage, including cataracts, corneal ulcers and retinal burns, respectively.

Near infrared wavelengths become visible as red while red wavelengths appear as green and green as blue. Blue wavelengths are shifted out of the visible portion of the spectrum and so they appear as black.

Science textbooks say we can’t see infrared light. Like X-rays and radio waves, infrared light waves are outside the visual spectrum. But an international team of researchers has found that under certain conditions, the retina can sense infrared light after all.

In short, yes, staring at bright lights can damage your eyes. When the retina’s light-sensing cells become over-stimulated from looking at a bright light, they release massive amounts of signaling chemicals, injuring the back of the eye as a result.

If the IR light is >1,500 nm, it is unlikely there will be any effects on the retina but damage to the cornea due to thermal heating could occur. The lens of the eye could possibly accrue damage due to elevated temperatures, leading to cataracts.

Summary: Staring at a deep red light for three minutes a day can significantly improve declining eyesight, finds a new study, the first of its kind in humans. Staring at a deep red light for three minutes a day can significantly improve declining eyesight, finds a new UCL-led study, the first of its kind in humans.