SOX 90w Low Pressure Sodium Lamp

The classic 90W SOX lamp — a pure 589nm low-pressure sodium light source trusted for scientific, engineering, and creative applications. With its uniquely monochromatic output, this lamp remains one of the most efficient and visually striking light sources ever made.

As the most powerful lamp in the SOX range, the 90W model delivers maximum brightness and coverage for large-scale applications. It is ideal for universities, laboratories, museums, science centers, physics demonstrations, black-fire experiments, optical research, and educational environments where a high-output monochromatic light source is required.

Historically used to illuminate roads, highways, and public spaces around the world, the 90W SOX lamp represents the iconic scale and performance that made low-pressure sodium lighting legendary.

Beyond scientific use, the 90W model is favored for immersive art installations, galleries, large photography and film productions, theatrical environments, experiential events, creator studios, and other projects where its dramatic monochromatic effect can transform entire rooms and large spaces.

In stock in the USA and ready to ship worldwide. Each lamp is carefully inspected and packaged before shipment to help ensure safe delivery.

Note: Requires a dedicated SOX ballast to operate. Please see our Ballast Collection for compatible control gear.

Product Code: LPS90W

Ideal for museums, galleries, science centers, university demonstrations, large-scale photography productions, immersive installations, and monochromatic lighting research. Perfect for illuminating larger spaces and creating dramatic visual experiences.

Electrical Specifications:
Nominal Wattage: 90w
Rated Wattage: 91w
Lamp Current (EM) (Nom): 0.82A
Voltage (Nom): 112v

Lifespan:
Average Lifespan: 12,000 hrs
Life to 8% Failures (Nom): 6,000 hrs
Life to 30% Failures (Nom): 8,000 hrs
Life to 50% Failures (Nom): 12,000 hrs

Temperatures:
Maximum Permitted outer bulb temperature: 150 °C / 302°F
Maximum Permitted base edge temperature: 150 °C / 302°F

Base: BY22D

Energy Efficiency Class: A++

Operating Position:
H110 [ Hanging +/-110D or Base Up (BU)]

Luminous Flux: 13,600 lm
Luminance: 10 cd/cm²
Luminous Efficacy: 150 lm/W
Energy Efficiency Class: A++

Unit Count: 1 Count
Max Diameter: 66mm / 2.60 in
Max Length: 525mm / 20.67 in

UKCA, RoHS, CE

In stock in the U.S. and ready to ship worldwide. Every order is carefully inspected and securely packaged before shipment.

Free shipping to the U.S. and Canada. Free shipping to Oceania on orders over $299 USD. Shipping charges for other destinations are calculated at checkout. Tracking is included with every order.

30-day returns on all eligible orders. U.S. returns are free, while international customers are responsible for return shipping costs.

International orders may be subject to import duties, taxes, or customs fees. These charges are the responsibility of the customer and are not included in the purchase price or shipping cost.

All SOX lamps are backed by a 1-year limited warranty against manufacturing defects. If you experience an issue with your order, please contact our team and we'll work with you to find a solution.

Q: Is this a newly manufactured lamp?
A: Yes. All lamps are newly manufactured and tested before shipment.

Q: How do I know this lamp is compatible with my fixture?
A: Match the wattage and base type to your existing SOX lamp. If you're unsure, send us a photo and we'll help verify compatibility.

Q: What if I'm not sure which lamp I need?
A: Contact us before ordering. We're happy to help identify the correct lamp for you.

Q: Are these lamps stocked in the United States?
A: Yes. Orders ship from our U.S. warehouse for faster delivery.

Q: Can I still get replacement SOX lamps in the future?
A: Yes. We work directly with the current manufacturer to maintain a reliable supply of SOX lamps.

Q: Why buy from Lumioo Studio?
A: We specialize in SOX lighting and provide product guidance, compatibility support, and access to newly manufactured lamps.