Product Overview
Sylvania 13397 100A21 277V — 100W A21 Mine Light Incandescent Bulb, Inside Frost — 277V Medium Aluminum Base — 1,042 Lumens — 1,000 Hours
The Sylvania 13397 100A21 277V is a 100W A21 incandescent lamp rated for 277V operation, built on a Medium Aluminum base with an Inside Frost finish. Manufacturer-classified as a “Mine Light” lamp, it's a Class C gas-filled incandescent delivering 1,042 lumens at 2850K with CRI 100, rated for 1,000 hours of average life.
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WATTAGE
100W
277V Rated
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LUMENS
1,042 lm
CRI 100
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COLOR TEMP
2850K
Class C (Gas)
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BASE
Medium
Aluminum
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RATED LIFE
1,000h
Inside Frost
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Technical Specifications
| Product Number | 13397 |
| Order Abbreviation | 100A21 277V |
| General Description | Incandescent A21 Bulb Shape, Mine Light, Inside Frost Finish, Medium Aluminum Base, 100 Watt, 277 Volt |
| Technology | Incandescent |
| Bulb Shape | A21 |
| Wattage (Nominal) | 100W |
| Voltage (Nominal) | 277V |
| Base Type | Medium (Aluminum) |
| Lamp Finish | Inside Frost |
| Lamp Class | C (Gas-filled) |
| Filament | C-7A |
| Approx. Lumens | 1,042 lm |
| Average Rated Life | 1,000 hours |
| Color Temperature (CCT) | 2850K |
| Color Rendering Index (CRI) | 100 |
| Diameter | 2.625" (66.68mm) |
| Light Center Length (LCL) | 3.875" (98mm) |
| Maximum Overall Length (MOL) | 5.313" (134.9375mm) |
| Packaging | 24 per case, 6 per SKU |
Product Overview
The Sylvania 13397 100A21 277V is a 277V-rated A21 incandescent lamp, manufacturer-classified as a Mine Light — a rough-service, high-voltage-circuit design built on a Medium Aluminum base rather than the brass base used on standard 120V household lamps. It's a Class C gas-filled incandescent with an Inside Frost finish, delivering 1,042 lumens at 2850K with CRI 100.
Rated for 1,000 hours of average life, this lamp is intended for 277V industrial, commercial, or high-voltage circuit applications where a standard 120V incandescent is not suitable.
Compatible Applications
- 277V commercial and industrial lighting circuits.
- Mine, tunnel, and rough-service lighting applications.
- High-voltage circuit fixtures where a standard 120V incandescent cannot be used.
- Facility maintenance applications requiring a 277V-rated A21 incandescent lamp.
Before Ordering – Verify
- Confirm your circuit is 277V — this lamp is not rated for standard 120V circuits.
- Confirm your fixture uses a Medium base — this lamp's base is aluminum, not brass; verify compatibility with your socket, especially in corrosive or high-moisture environments.
- Confirm your fixture is rated to safely operate a 100W incandescent lamp at 277V.
- This is an A21 bulb, not an A19 — verify physical fixture clearance before ordering.
- Verify Maximum Overall Length (5.313in) and diameter (2.625in) clear your fixture.
Safety and Handling Guidelines
- Disconnect power before installing or removing the bulb.
- This lamp operates at 277V — ensure only qualified personnel install or service fixtures on 277V circuits.
- Allow the lamp and fixture to cool completely before handling.
- Use only in fixtures rated for 277V operation and this lamp's 100W power consumption and heat output.
- Do not install a lamp with cracked, loose, or otherwise damaged glass.
- Keep combustible materials away from the lamp and hot fixture surfaces.
Compliance
- Manufactured by Sylvania.
- Class C (gas-filled) incandescent lamp construction.
Ordering Information
- Product Number: 13397
- Order Abbreviation: 100A21 277V
- Description: 100W A21 Mine Light Incandescent Lamp, Inside Frost, 277V, Medium Aluminum Base
- Packaging: 24 per case, 6 per SKU
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.
