Medium pressure, quartz, mercury-vapor lamp. For use in all listed immersion wells. 61cm PTFE covered lead wires, fitted with pin type connectors and 6' cord for connecting to power supply, permit lowering lamp into well for vertical operation. Of total energy radiated, approximately 40-48% is in the ultraviolet portion of the spectrum, 40-43% in the visible, the balance in the infrared. For replacement cord, see 9698-10.