Life Span of High Power Sodium Lights

Power and Model

• The lifespan of a high pressure sodium bulb varies with the size, strength, care and operation of the bulb. The quality of the bulb depends on the model and manufacturer; low-quality bulbs may last less than 1,000 hours, while high-quality bulbs may last up to 30,000 hours.

Average Life Span

• The average lifespan of high pressure sodium bulbs is in excess of 20,000 hours, according to J J de Groot; author of "The High-Pressure Sodium Lamp." A ballast is required to safely operate HPS bulbs, as the power must gently be increased and decreased to prolong life.

Operation

• The conditions in which the bulb is used also play a role in determining its life. Prolonged use of a bulb in extreme temperatures can negatively affect the bulb. The sodium vapor inside the bulb is sensitive to temperature changes.

Advances

• Advanced in HPS bulb technology have resulted in increasing longevity. The newest industrial-model bulbs have been tested at over 50,000 hours in ideal conditions.