PHILIPS LIGHTING 321539 135W 164V 1800K T21 BY22D Base Low Pressure Sodium Lamp - SOX, Clear

High energy efficiency low pressure sodium lamps for indoor and outdoor applications. Ideal for roadway lighting, bridge and tunnel lighting, security lighting, area floodlighting, railway crossing lighting and airport lighting.BENEFITS:• Vibration resistant. • Long Life. • Energy efficient FEATURES: • Energy Efficienct up to 180 lumens per watt. • 18,000 hours rated average life. • Vibration Resistant - rough service arc tube support system provides protection against shock and vibration.