Liberty Long Life Lighting
Farmington Hills, MI
Products - HPS
High Pressure Sodium (HPS) Lamps
Lamp Features
Double Arc-Tube Support -  The shock and vibration of wind and traffic are absorbed by the unique arc tube suspension system.  It keeps the arc tube aligned and its thermal seals free of undue stress that can cause early lamp failure.

Advance Electrode Design  -  The electrode provides long, dependable lamp life, especially in the lower wattage lamps, up to 100 watts, where our exclusive design of concentrated emitter helps to deliver the longest lamp life in the industry.

Arc Tube -  The arc tube is made of high quality alumina-ceramic which is capable of withstanding metallic sodium corrosion at very high temperatures.

Sealing  -  The arc tube is hermetically sealed at both ends to insure maximum life.

Getter  -  The getter absorbs gasses released during lamp operation to maintain a perfect vacuum over the life of the lamp.

Nickel-Plated Brass Base  -  Not just a brass base, as is commonly used by most lamp manufacturers, but a nickel-plated  brass base to allow for easy removal of the lamp at end of its life.  Also, a porcelain inset is added for better insulation against high voltage pulses.
Liberty Long Life Lighting Company Guarantees Sodium Vapor Lamps for 60 Months