The lamp ballast construction and warranty

Pulse Start Metal Halide Construction
In the 1980s, metal halide lamps were typically 175 watts and lower but with technology
and the use of electronics, lamp designers began to look into removing this starter probe
and increasing the fill pressures. By coordinating designs of both lamp and ballasts, the
lamp designer was able to remove the starter probe.

175 Watt Mercury Vapor Ballasts with UL

The lamp ballast designer then increased
the starting voltage and provided a special electronic starting circuit which is often
referred to as an “igniter” or “starting aide.”
The removal of the starter probe and increased starting voltage allowed the arc tube
designer to increase the arc tube fill pressure, all of which gave a significant
improvement in lamp lumen maintenance and life. Thus, was born the “Pulse-Start”
lamp. Eventually, this design would spill over to higher wattage lamps and today’s family
of JAMES Metal Halide lamps range in wattage’s from 32 watts up to 1000 watts
in both clear and coated lamps.

Probe Start Metal Halide Ballast Wiring Diagram

The addition of the electronic starting circuit has not only allowed for higher starting
voltages to the arc tube but has also created the opportunity for ballast manufacturers to
reduce the size of the ballasts. This reduced size translates into a magnetic ballast that is
less costly to produce, cooler to operate and more energy efficient with fewer watts loss.

This warranty is conditional upon installation, maintenance and operation in accordance with JAMES’s instructions and specifications set forth in the purchase order or contract at the time of order and in accordance with the standards of The National Electric Code (NEC), Underwriters’ Laboratory, Inc. (UL) and the American National Standards Institute (ANSI) and, in Canada, with the standards of the Canadian Standards Association (CSA). Damage by misuse or abnormal conditions of storage, installation, maintenance or operation, including, but not limited to, excessive temperatures or evidence of partial or complete disassembly beyond normal maintenance or expansion procedure void this warranty in its entirety.

The conditions of any tests performed concerning any ballast product claimed to be defective in accordance with the terms of this warranty shall be mutually agreed upon in writing between the original purchaser or first end-user and JAMES may be represented at any such test. No implied statutory warranty of merchantability or fitness for a particular purpose shall apply beyond the afore-mentioned warranty period. This warranty excludes other warranties, expressed or implied and is the exclusive remedy of the claimant. JAMES shall not be liable for any special, indirect or consequential damages. JAMES’s liability on any claim of any kind, nature or description arising out of, resulting from or concerning any aspect of this warranty agreement or from the product or services furnished hereunder shall not exceed the price of the specific ballast or ballasts which give rise to the claim.


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