Nevertheless, women were still a distinct minority of the 435 House Members; at their peak during this period, nine served in the 71st Congress (1929â1931). They lacked the power to focus congressional attention on the issues that were important to them.
NVG â Night Vision Green (495 nm): NVG LEDs, along with red LEDs, are useful for preserving night vision. NVG colored LEDs are useful for military pilots as well, who have special equipment that is designed to work with NVG lights. Blue LEDs are often used for map reading at night.
The Dark Side of LED Lightbulbs. Indeed, LED (light emitting diode) lighting does seem to be the wave of the future right now, given the mercury content and light quality issues with the current king-of-the-hill of green bulbs, the compact fluorescent (CFL). LEDs use significantly less energy than even CFLs, and do not contain mercury.