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 Emitting Diodes (LEDs) MiniScience supplies the most useful LED lights for science and educational activities. These are generally LEDs that require very little voltage and very little current and produce a very bright light. In many science experiments such as making electricity from potato these LEDs play a major role in successful demonstration of the project.