High Output (HO) germicidal lamps yield 1/3 to 2/3 more ultraviolet output than standard lamps of the same length. Ballasting is available in 120v and 220v. Custom designed lengths can also be supplied.The unique single-ended design is suited for test tube-shaped quartz sleeve application. The end of the lamp with the pins is positioned at the open end of the sleeve at the top. This reduces electrical problems associated with condensation at the bottom of vertical units. Electrical continuity is accomplished through the use of two external Teflon coated wires. Longer lengths employ spacing rings. The 4-pin single ended design permits the use of standard SteadfastTM sockets. The lamps are supplied with ceramic bases, which are resistant to ultraviolet and ozone. They will not burn or deteriorate, and theyeliminate quartz sleeve fogging.