There's a lion's share of potential energy in the vibrations produced by footsteps on dance floors, exercise machines in the ...

The approved light installation agreement will convert the street lights ... Street lights in West University Place consist of high-pressure sodium vapor and metal halide bulbs, agenda documents state ...

To eradicate ‘dark spots’ in the national capital and ensure the safety of commuters, especially women, the Public Works Department (PWD) has decided to replace all the existing yellow sodium vapour ...

Abstract: In this paper, a low-cost electronic ballast for high-pressure sodium vapor lamps is presented. The proposed ballast is a two-stage circuit that requires only one switch and one inductor for ...

The yellow light of sodium vapour lamps in street lights will soon be a thing of the past in the city. The project to replace all energy-guzzling sodium vapour lamps with LED lights has finally taken ...

Communities along the Great Lakes are preparing for the annual mayfly season, but water temperatures may not be warm enough quite yet for the fishflies to produce massive swarms. "The timing of mayfly ...

Mayflies emerge when deep water temperatures reach 68 degrees, which hasn't happened yet in the Great Lakes. Residents can mitigate mayfly presence by using yellow light bulbs and sealing windows and ...

I’ve noticed when the city repairs broken streetlights that sometimes they install a new LED light and sometimes they do not. I would think they want to convert all the streetlights to LED lights when ...