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.
An LED light bulb is a solid-state lighting (SSL) device that fits in standard screw-in connections but uses LEDs (light-emitting diodes) to produce light. LED light bulbs are a more environmentally-friendly alternative to incandescent bulbs. LED bulbs use a semiconductor device that emits visible light when an electric current passes through it. That property is known as elecroluminescence.