Ushio BC2411 CF9S/827 9W 2700K CFL Bulb — main product image

Ushio

Ushio BC2411 CF9S/827 9W 2700K CFL Bulb

Name: Ushio BC2411 CF9S/827 9W 2700K CFL Bulb
Brand: Ushio
SKU: BC2411

★★★★★5.0 (3 reviews)

A compact 9-watt CFL plug-in bulb delivering 600 lumens of warm 2700K light with a 10,000-hour rated lifespan.

$10.99*

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Ushio BC2411 CF9S/827 is a 9-watt compact fluorescent plug-in lamp designed for fixtures equipped with G23 2-pin sockets. It delivers 600 lumens of initial light output at a color temperature of 2700K, producing the warm white glow associated with traditional incandescent lighting. With a Color Rendering Index of 82, it renders colors reasonably well for general-purpose applications including desk lamps, wall-mounted fixtures, recessed downlights, and hospitality lighting where warm ambiance is preferred.

Rated for 10,000 hours of operation, the CF9S/827 offers a long service life that reduces maintenance frequency in commercial and residential installations. Its single-tube design keeps the form factor compact enough to fit in space-constrained luminaires, and the 9-watt power draw delivers meaningful energy savings compared to incandescent equivalents. As a plug-in CFL, it requires a compatible ballast within the fixture—it is not a self-ballasted screw-in type. The Ushio CF9S/827 serves as a dependable replacement lamp for existing CFL infrastructure where G23-socket fixtures remain in service.

Key Features

Color/Finish: Warm White

Color Temperature: 2,700K

Average Lifetime: 10000 hours

Lumens (light output): 600

Specifications

Brand

Ushio

Model / Part No.

BC2411 / 3000066

Lamp Designation

CF9S/827

Wattage

Base Type

G23 (2-Pin)

Color Temperature

2700K (Warm White)

Lumens (Initial)

600

CRI

Rated Lifespan

10,000 Hours

Lamp Shape

Single Tube Compact

Pros & Cons

👍 Pros

600 lumens from just 9 watts provides significant energy savings over equivalent incandescent lamps
10,000-hour rated lifespan reduces the frequency and cost of bulb replacements
2700K warm white color temperature matches incandescent ambiance for residential and hospitality settings
Compact single-tube form factor fits in space-constrained fixtures designed for G23-base CFLs

👎 Cons

G23 2-pin base limits compatibility to fixtures specifically designed for plug-in CFL bulbs
CRI of 82 is adequate but noticeably lower than halogen or high-CRI LED alternatives for color-critical applications
As a CFL, it contains a small amount of mercury and requires proper recycling rather than standard disposal
Not dimmable without a compatible dimming ballast in the fixture

Frequently Asked Questions

What base type does the Ushio CF9S/827 use?

This bulb uses a G23 2-pin base, which is a plug-in style connector commonly found in compact desk lamps, wall sconces, and recessed downlight fixtures designed for single-tube CFL bulbs.

What color temperature does this bulb produce?

It produces 2700K warm white light, which is similar to the color of traditional incandescent bulbs and creates a comfortable, inviting ambiance.

How much light output does the Ushio CF9S/827 provide?

The bulb produces 600 initial lumens from just 9 watts of power, offering comparable light to a traditional incandescent bulb at a fraction of the energy consumption.

Does this CFL bulb require a ballast?

Yes, G23-base CFL plug-in bulbs like the CF9S require a compatible magnetic or electronic ballast, which is typically built into the fixture. This bulb is not self-ballasted.