The T28 LED bulb is a compact 2W replacement bulb designed for low-voltage lighting systems and special-voltage lighting systems. With 150LM output, E27 or B22 base options and multiple voltage configurations, it is suitable for railway vehicles, RVs, motorhomes, boats, refrigerators and industrial equipment.
The 10–30VDC T28 LED bulb covers common 12V and 24V electrical systems, while additional voltage versions are available for equipment with special power requirements. Its compact D28 × L58mm size makes it practical for fixtures where installation space is limited.
Why Choose a 10–30VDC T28 LED Bulb?
Many mobile and special-purpose lighting systems do not operate at standard household voltage.
The 10–30VDC LED bulb is suitable for both nominal 12V and 24V systems, making it easier for buyers to use one bulb specification across different vehicles and equipment.
Compared with selecting separate fixed-voltage bulbs, a wider operating voltage range is particularly useful for:
Railway vehicles
RVs and camper vans
Boats and yachts
Battery-powered lighting
Special-purpose machinery
Mobile equipment
Additional 75V and AC voltage versions are available for applications using different electrical systems.
Applications of T28 LED Bulb
**Railway & Train Carriage Lighting**
The T28 LED bulb is widely used in railway passenger carriages, locomotive cabins, and metro train interiors.
The 10-30VDC voltage range perfectly matches standard train DC power systems. Shatterproof PC cover ensures safety in high-vibration environments.
**RV, Motorhome & Camper Van**
A popular direct replacement for incandescent bulbs in RV and motorhome interior lighting. Compatible with 12V and 24V onboard power systems.
The compact T28 size fits most standard E27 and B22 sockets found in recreational vehicles.
**Marine & Boat Cabin Lighting**
Suitable for yacht saloons, boat cabins, and below-deck lighting. Corrosion-resistant PC cover and low power consumption (2W) make it ideal for 12V and 24V marine electrical systems.
**Refrigerator & Cold Storage**
Fits standard E27 and B22 refrigerator lamp sockets. Available in 120VAC and 240VAC for household and commercial cold storage use.
Low heat output protects food quality and extends bulb life.
**Holiday & Festive Decoration**
Compatible with outdoor decorative lighting systems, amusement park string lights, and seasonal festive installations.
Multi-voltage support allows use across different regional power standards.
**Industrial Special Equipment**
Designed for special machinery, control panels, and industrial equipment requiring 75VDC or 120VDC power.
Reliable 30,000-hour lifespan reduces maintenance costs in hard-to-access installations.
E27 or B22 – How to Select the Correct Base
Two common base configurations are available.
E27 T28 LED Bulb
The E27 LED bulb uses a standard screw-type lamp base and can be selected for compatible railway, RV, marine, refrigerator and equipment fixtures.
B22 T28 LED Bulb
The B22 LED bulb uses a bayonet-style connection and is suitable for equipment and lighting fixtures designed around a B22 socket.
Before placing a bulk order, confirm the existing lamp holder rather than selecting only according to voltage.
FAQ-T28 LED Bulb
Can this T28 LED bulb work on both 12V and 24V?
Yes. The 10–30VDC version covers common nominal 12V and 24V DC systems.
What is the power of the T28 LED bulb?
The ZST28-20L has a rated power of 2W and provides approximately 150LM in white.
What lamp bases are available?
The current standard options are E27 and B22. Other base requirements should be confirmed before ordering.
Can it be used as an RV LED bulb?
Yes, the 10–30VDC version can be used in compatible 12V and 24V RV, motorhome and caravan lighting fixtures.
Can this bulb be used on boats?
It can be used in compatible boat and yacht interior lighting fixtures. For exposed marine applications, the waterproof rating and environmental protection of the complete fixture should be confirmed separately.
Is the T28 bulb suitable for refrigerators?
Yes, its compact size makes it suitable for compatible refrigerator and refrigeration equipment fixtures. Confirm the original lamp's voltage, base and dimensions before replacement.
Do you supply special-voltage LED bulbs?
Yes. In addition to the 10–30VDC version, this model is available in additional voltage configurations for special equipment applications.
What information should I provide when requesting a quote?
Please provide the required voltage, lamp base, light color, quantity and application. For replacement projects, providing the original bulb specification or photos can help confirm compatibility.
