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 white LED lamps that resulted from this invention emit very bright white light and are superior in terms of energy efficiency and lifespan when compared with incandescent and fluorescent bulbs. LEDs can last some 100,000 hours, whereas incandescent bulbs only last around 1,000.