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.
LEDs come in many colors, and some LEDs contain multiple elements and are therefore capable of multiple colors. LEDs are most commonly used for keypad backlights and service/message indicator lights. LEDs are also often used for LCD display backlights. Bright white LEDs can provide a flashlight function. Recently, bright white LEDs have also been used to provide a flash function for a camera-phone. An LED camera flash is generally not as bright as the xenon technology used in standalone cameras. Some LED flashes are brighter than others, however (up to 20 times brighter, in some cases.). LED flashes remain lit for a period of time, unlike the extremely brief strobe of light produced by xenon technology.