For one thing, many forest birds are adapted to dimmer conditions and avoid flying across bright open spaces to get to shaded areas.
And in the stampede for university places that has taken place over the past 20 years, clever children from poor families have indeed lost out to dimmer peers from prosperous ones.
The resulting collection of LEDs works on rechargeable batteries that, when used at maximum wattage, last for up to five hours and, at minimum wattage, will run for two to three days, thanks to dimmer switches on their bases.
It was the most optimistic assessment yet from senior NATO officials, and runs counter to dimmer appraisals from some Afghan officials and other international agencies, including the United Nations.
The graph below shows the selective increase in sensitivity to dimmer flashes that occurred during the recording (bars are SEM).
Collectively, these results suggest that temperate reef-associated fishes are well-adapted to their gradient of brighter to dimmer photoclimates, representative of their unique ecologies and life histories.
