Sunny DayA sunny day has its moments of pure bliss. Otherwise, the Beatles wouldn’t have written a song about its coming, saying it’s alright. Sunlight is great at illuminating a building’s interior as well. There is little need for electronic lighting if you have a skylight which gradually filters the sun into a structure. It also helps if you have a few plants inside that you’d like to get their share of sunlight.

Like anything else, however, you can only have too much sunlight. It’s only a matter of time before you’ll need to close those skylight window blinds. But just how much sun is too much?

When There’s Too Little Sunshine

It helps to know what happens if there is too little sun. As you may know, sunlight is a good source of vitamin D. The body requires vitamin D to bolster bone strength and immunity. Over 90 percent of the body’s vitamin D requirement can be sourced from the sun.

A lack of vitamin D can cause bone issues such as osteoporosis (adults) and rickets (infants). Osteoporosis is a decrease in bone density, while rickets is characterised by bowed legs. This is due to a vitamin D deficiency causing imperfect hardening and softening of bones. As for the immune system, vitamin D helps T-cells (which require the vitamin to be aware of a potential health threat) be active. A lack of vitamin D causes these cells to become dormant and practically useless.

When There’s Too Much

Some health experts say that 20-25 minutes of sun exposure is all you need. This is as simple as walking out for lunch from the office. But there is a takeaway, according to other professionals: sun exposure is cumulative. Based on this claim even 20 minutes of direct exposure can be enough to increase the risk of skin cancer.

It’s a fact that too much sunlight also accelerates aging. This is due to the UV rays in sunlight. UV rays damage elastin, skin fibres which make it elastic as the name suggests. In turn, sagging, stretchy skin comes as a result. Damaged elastin fibres also make the skin more vulnerable to bruising and tearing. They also prolong the healing time.

Get a fair amount of sunlight to stay healthy, but learn how to draw the line when needed.