Product Overview
The Osram Dulux L 18W/835 Lumilux is an 18W single-ended long twin-tube compact fluorescent lamp engineered for commercial and institutional modular luminaires, shallow recessed downlights, surface-mounted fixtures, and task lighting in offices, retail, and hospitality environments. Delivering approximately 1,200 initial lumens of 3500K natural white output at 80–89 CRI through a 2G11 4-pin base in a compact 217mm profile, this Lumilux-coated CFL provides a 7,500-hour rated service life — compatible with magnetic, electronic, and dimming ballast systems.
| Wattage 18W Dulux L CFL | Initial Lumens ~1,200 lm 80–89 CRI | Color Temp 3500K 835 Lumilux White | Base 2G11 4-Pin Single-Ended | Rated Life 7,500 Hr 217mm Length |
ADL Supply Expert Application & Replacement Guide
The Osram Dulux L 18W/835 is primarily specified by electrical contractors and facility maintenance teams for replacement in Dulux L-format modular luminaires, shallow recessed commercial downlights, under-cabinet task strips, and surface-mounted ceiling fixtures where the 2G11 base and 217mm compact twin-tube format are the installed standard. The 2G11 4-pin base uses an 11mm spacing between the two pairs of pins in a single-ended configuration — it is physically distinct from the GX24q compact quad-tube base, the 2G7 small single-tube base, and the G5 T5 linear base, and will only seat correctly in a 2G11 socket. This lamp is notable for its broad ballast compatibility — unlike some CFL platforms that require programmed-start electronic ballasts exclusively, the Dulux L is compatible with conventional magnetic ballasts, electronic ballasts (ECG), and dimming electronic ballasts, making it appropriate for both legacy magnetic-ballasted commercial fixtures and modern electronic systems. For partial relamping, confirm all replacement lamps are 3500K before ordering — mixing color temperatures in the same visual field creates a perceptible inconsistency.
Before You Order
| Verify Before Ordering 2G11 Socket Required — Not GX24q, 2G7, or G5 | Confirm Ballast Type (Magnetic, Electronic, or Dimming) | State Shipping Restrictions Apply Confirm your fixture socket is 2G11 — this base is not compatible with GX24q, 2G7, or G5 sockets. Confirm your ballast is rated for 18W Dulux L operation — magnetic, electronic, and dimming ballasts are all compatible. Confirm 3500K natural white matches your installation. Contains mercury — cannot be shipped to CA, CO, HI, ME, MN, OR, RI, or VT. |
Detailed Product Specifications
- Brand: Osram
- Product Line Series: Dulux L Lumilux — Long Twin-Tube Compact Fluorescent
- Model Designation: Dulux L 18W/835
- Osram Order Code: Confirm with Osram specification sheet
- UPC Barcode: Confirm with Osram specification sheet
- Core Technology: Long Twin-Tube Compact Fluorescent — Lumilux Phosphor Coating
- Ballast Compatibility: Magnetic (conventional), electronic (ECG), and dimming electronic ballasts
- Wattage: 18W
- Initial Lumens: Approximately 1,200 lm
- Color Temperature (CCT): 3500K Natural White (835 / Lumilux White)
- Color Rendering Index (CRI): 80–89 Ra
- Base Type Configuration: 2G11 4-Pin Single-Ended (11mm pin spacing)
- Tube Diameter: 17.5mm
- Maximum Overall Length (MOL): 217mm (8.54 inches)
- Rated Average Lifespan: 7,500 Hours
- Burn Position: Universal — Any Orientation
- Mercury Content: Contains mercury — recycle per applicable regulations
Operation, Safety & Mounting Compliance
2G11 Base Specificity & Broad Ballast Compatibility
The 2G11 base is the standard single-ended base for Dulux L and Philips PL-L format long twin-tube compact fluorescent lamps — the two pairs of 4 pins are aligned on a single end of the lamp, and the 11mm pin-group spacing is specific to this base class. The Dulux L platform was designed for universal ballast compatibility from its introduction, supporting both conventional magnetic (choke) ballasts and modern electronic ballasts — this distinguishes it from programmed-start-only CFL platforms and makes it a viable replacement in legacy commercial fixtures that have not been upgraded to electronic ballasts. For dimming applications, confirm the electronic dimming ballast is rated for 18W Dulux L operation.
Mercury Content & Disposal
This lamp contains mercury and must be recycled through a certified lamp recycling program in compliance with applicable federal, state, and local regulations — do not discard in standard municipal solid waste. This product cannot be shipped to CA, CO, HI, ME, MN, OR, RI, or VT.
Industry Cross-Reference Data
- Philips: PL-L 18W/835/4P (equivalent 18W 2G11 4-pin 3500K long twin-tube CFL)
- GE Lighting: F18BX/835/4P (equivalent 18W 2G11 natural white Dulux L format)
- Sylvania: CF18DD/835 2G11 (equivalent 18W 4-pin double-twin 3500K)
- Legacy Cross-Reference: Direct replacement for 18W 2G11 4-pin 3500K long twin-tube CFL lamp positions in modular commercial downlights, task lighting, and shallow recessed fixture installations
Bulk Commercial Lighting Supply & Project Support
ADL Supply delivers commercial-volume logistical fulfillment, tiered commercial contractor discounting strategies, and full pallet project quoting options to electrical accounts across the United States.
For formal wholesale inquiries, volume pricing modifications, or manufacturer spec sheet documentation, reach our commercial branch directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.
