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.
Light Bulb Types. LED light bulbs or lamps utilize light-emitting diodes in order to produce light. LED is a âsolid-stateâ technology, which means that the materials used to generate the light are encased within a solid material. Practically, this translates into a lamp with a rated life much longer than those using non-solid-state technology (such as incandescent, halogen, and fluorescent).