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posted by Fnord666 on Wednesday February 07 2018, @12:01PM   Printer-friendly
from the a-bright-idea dept.

Submitted via IRC for TheMightyBuzzard

Spending too much time in dimly lit rooms and offices may actually change the brain's structure and hurt one's ability to remember and learn, indicates groundbreaking research by Michigan State University neuroscientists.

A new study reveals exposure to dim light might impact memory and learning. Researchers report rodents exposed to dim lighting lost 30 percent of hippocampal capacity and performed poorly on spatial tasks they had previously experienced.

The researchers studied the brains of Nile grass rats (which, like humans, are diurnal and sleep at night) after exposing them to dim and bright light for four weeks. The rodents exposed to dim light lost about 30 percent of capacity in the hippocampus, a critical brain region for learning and memory, and performed poorly on a spatial task they had trained on previously.

The rats exposed to bright light, on the other hand, showed significant improvement on the spatial task. Further, when the rodents that had been exposed to dim light were then exposed to bright light for four weeks (after a month-long break), their brain capacity – and performance on the task – recovered fully.

The study, funded by the National Institutes of Health, is the first to show that changes in environmental light, in a range normally experienced by humans, leads to structural changes in the brain. Americans, on average, spend about 90 percent of their time indoors, according to the Environmental Protection Agency.

Source: http://neurosciencenews.com/dim-light-dumber-8433/


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  • (Score: 1, Interesting) by Anonymous Coward on Wednesday February 07 2018, @05:49PM (1 child)

    by Anonymous Coward on Wednesday February 07 2018, @05:49PM (#634456)

    Note however that LEDs might have a considerably higher apparent power. And it is the apparent power that limits what you can insert into your socket (while the real power determines your energy consumption and — hopefully — what you pay to the electricity provider). This is because the truly limiting factor is the amperage, and the apparent power is simply volt times ampere. Incandescent light bulbs have an Ohmic resistance, and therefore the apparent power equals the real power. For LEDs (actually, the electronics needed to connect them to the grid) this is not necessarily the case.

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  • (Score: 1, Interesting) by Anonymous Coward on Wednesday February 07 2018, @06:16PM

    by Anonymous Coward on Wednesday February 07 2018, @06:16PM (#634473)

    Not true. Often, the power factor is over 90% and I've never seen a power factor below 50%. So compare 11-20W for the LED to 50W for the incandescent.