Have you ever seen what eyes look like after they've been ravaged by marijuana grow lights?
Yeah, me neither.
But that doesn't stop some from warning us all of the dangers and insisting we all need protective glasses.
What Types Of Light Can Cause Us Harm?
Any type of light can be harmful to our eyesight, if it is powerful enough. If you’ve ever looked directly at a powerful light source, you’ll know this (and hopefully have looked away quickly enough before any serious harm was done).

However, some types of light are much more harmful than others and even small amounts of certain light can damage our eyes.
Are powerful led grow light Harmful To Humans?
Effect Of Blue Light On Humans
The most commonly known negative affect of blue light is what it does to our sleep.

During the day, blue led grow lights samsung keeps us alert and awake. But exposure to blue light at night suppress the secretion of melatonin, which is a hormone that influences circadian rhythms. This makes it harder for us to fall asleep and leaves us more tired and sluggish.

There is also a possibility that lower melatonin levels are inked to obesity, diabetes and some types of cancer, but much more study is needed to determine if there is, in fact, a connection.
Effect Of Blue Light On Our Eyes
Blue light can also negatively impact our vision. Our cornea does not do a good job of blocking blue light, meaning almost all of the blue light that hits our eyes penetrates all the way through to the retina.

Too much blue light has been proven to damage light sensitive cells on the retina. This brings about changes that are similar to macular degeneration, which can result in permanent vision loss.

This is obviously an extreme case and would require a lot of blue light exposure, but we get much more of it these days than ever before, thanks to our various screens (computer, phone, TV, etc.). Adding in high amounts of blue light from your grow room is a definite cause for concern.

The research so far is limited and we lack a good understanding of the long-term effects of too much blue light, and even how much blue light is too much. Nevertheless, it makes sense to err on the side of caution and take steps to protect our eyes.
Effect Of UV Light On Humans
UV light affecting eyes
Many of the effects of UV light are well known. It causes varying degrees of skin damage, from premature aging, to sunburn, to cancer. It also causes damage to our vision and that is what most concerning to us here.