[ChrisMentrek] shares a design for a simple green LED signal light intended for experiments ... There’s also a handy link about firefly flashing patterns from the Massachusetts Audubon society ...

Right now, the $40 Asmad Outdoor Firefly Solar Lights have been ... but each of these lights consists of eight large LED lightbulbs. The bulbs are affixed to tall, flexible rods that gently ...

But as firefly populations decline ... Reducing light pollution by using warm-colored LED lights and turning off unnecessary outdoor lights can make a big difference. Supporting conservation ...

A new system of flashing red lights is aimed at helping hearing impaired drivers differentiate between police cars on patrol and those rushing to emergencies. The move is in response to a ...