Product Overview
The Sylvania Circline 20401 (FC8T9/WW/RS) Lamp is a commercial-grade, space-saving 22-watt circular fluorescent bulb engineered for shallow ceiling ring fixtures, utility spaces, and commercial corridor luminaires. Delivering 1,050 initial lumens of inviting 3000K warm white illumination, this T9-profile ring lamp features uniform omnidirectional light distribution to eliminate standard shadow bands. Outfitted with an industry-standard G10q 4-pin internal connection base, it provides a 12,000-hour rated average service life when paired with matching Rapid Start electromagnetic or electronic ballast networks.
| Wattage 22W T9 Circline Ring | Brightness 1,050 lm Initial Output | Color Temperature 3000K Warm White (830) | Rated Life 12k Hrs Average Service |
ADL Supply Expert Application & Replacement Guide
The Sylvania 20401 circular bulb is a trusted building facility and property management standard specified heavily for surface-mounted ceiling rings, residential-grade kitchen clouds, commercial restroom fixtures, and architectural accent wall sconces. Designed with a balanced 8-inch outside diameter ring path, it spreads full-spectrum illumination uniformly across a broad radial footprint, effectively removing the harsh center casting shadows standard when trying to configure linear tubes into round fixture pan housings.
Critical Ballast Selection and Pin Alignment Seating Guidelines: This 22W model utilizes an industry-standard G10q 4-pin plug-in base configuration, featuring an integrated layout where all four electrical pins are localized inside a single internal connector block along the ring inner wall. For full flicker-free ignition sequences and to secure its complete 12,000-hour rated lifespan, this lamp must be wired to a compatible Rapid Start ballast network providing a nominal 62V AC operating arc loop.
Installers executing large-scale relamping sweeps must handle base alignment with care: ensure the socket header pins line up cleanly with the internal receiver tracks before applying structural sliding pressure. Forcing or twisting the plastic ring at an uneven entry angle will bend or shear the pins, rendering the entire fluorescent loop unusable.
| Rapid Start Ballast Checked — Regional Shipping Restrictions Apply This is a specialized fluorescent ring lamp that cannot function natively on standard direct 120V main lines without a dedicated fluorescent ballast. Verify that your host fixture canopy incorporates an operational Rapid Start ballast mechanism and is dimensioned exactly for an 8-inch nominal circular profile before checking out your cart. State Delivery Restrictions: Due to strict regional environmental and heavy metal tracking laws, this fluorescent product cannot be shipped to residential or commercial destinations inside CA, CO, HI, ME, MN, OR, RI, or VT. |
Detailed Product Specifications
- Brand: Sylvania (OSRAM Sylvania Group)
- Product Series Line: Circline T9 High-Uniformity Circular Series
- Sylvania Order Code Catalog SKU: 20401
- Manufacturer Nomenclature Model: FC8T9/WW/RS
- UPC Barcode Number (GTIN-12): 046135204012
- Core Technology Class: Fluorescent Gas-Discharge — T9 Circular Ring Profile
- Primary Industry Ballast Requirement: 22W T9 Rapid Start Ballast Circuitry
- Operational Wattage: 22 Watts
- Nominal Arc Voltage Profile: Ballast Managed (Nominal 62V AC Lamp Operating Voltage)
- Initial Luminous Brightness: 1,050 Lumens
- Mean Luminous Lifecycle Output: 840 Lumens (80% Lumen Maintenance Factor)
- Color Temperature Configuration: 3000K Warm White (WW Phosphor Spectrum)
- Color Rendering Index (CRI): 52 Ra
- Base Type Configuration: G10q (4-Pin Internal Square Plug-In Matrix)
- Nominal Tube Profile Diameter: T9 Linear Shield (1.125" Inches / 28.5mm actual glass width)
- Nominal Structural Outer Diameter: 8.00" Inches total circle span width
- Rated Average Service Lifespan: 12,000 Hours (Constant Ballast Control Regulation)
- Chassis Burn Position Limit: Universal — Operates reliably in any flat mounting position
Operation, Safety & Mounting Compliance
Rapid Start Low-Temperature Ignition Tracks
This gas-discharge ring lamp utilizes continuous cathode preheating parameters enabled by standard Rapid Start ballast control blocks to spark immediate visible output with zero flicker intervals. To preserve internal phosphor layers and avoid cathode blistering, do not mount this lamp on older instant-start wiring loops. The standard engineered minimum ambient starting threshold rests at 50°F (10°C), making it ideal for standard conditioned interior environments.
Mercury Content Dosing and Safe Bulk Recycling
This fluorescent ring relies on trace mercury dosing locked inside its low-pressure tube chamber to complete its electrical UV arc generation pathway. While engineered with specialized internal coating layers to minimize glass adhesion tracking and stabilize a high lumen maintenance factor over its 12,000-hour operational cycle, it still contains heavy metal toxins. It must be processed through structured commercial bulk recycling paths during office maintenance swaps rather than discarded in standard solid municipal waste bins.
Commercial Ballast Industry Cross-References
- GE Lighting Match: FC8T9/WW / Order Code 11029 (Standard 8-Inch Circline)
- Philips Alternative: FC8T9/Warm White / Order Code 39117-7
- Eiko Reference: FC8T9/WW / Order Code 15124
Bulk Commercial Lighting Supply & Project Support
ADL Supply handles volume distribution shipments, multi-pack logistics, and contractor project quotes for procurement teams, schools, and warehouse facilities nationwide.
For specialized contractor pricing tiers, job-site pallet deliveries, or comprehensive submittal documentation, contact our support team directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.
