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Sylvania 21272 CF9DS 9W Compact Fluorescent Light Bulb 10-Pack — main product image
Sylvania

Sylvania 21272 CF9DS 9W Compact Fluorescent Light Bulb 10-Pack

★★★★★4.0 (46 reviews)

Warm 2700K compact fluorescent at 9 watts — long-life, energy-efficient fill lighting for practical fixtures, work lamps, and utility studio setups.

$23.99*
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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 Sylvania CF9DS/827/ECO is a 9-watt compact fluorescent lamp designed for utility, ambient, and background lighting in spaces where energy efficiency and long lamp life matter more than cinema-grade color accuracy. Its 2700K color temperature sits in warm white territory — a natural match for tungsten-adjacent environments, practical accent fixtures, and workspaces where a welcoming, non-clinical light quality is the goal. At 580 lumens from 9 watts, the output-to-power ratio is efficient for the CFL category, and the 10,000-hour rated lifespan makes it a low-maintenance choice in multi-lamp setups where frequent relamping is impractical.

The G23 2-pin base constrains fixture compatibility, so confirming socket type before installation is essential. The non-dimmable design means this lamp operates at a fixed output with no intensity control — a practical limitation in any space where variable lighting levels are part of the workflow. For video production use, the AC line-frequency operation introduces flicker risk at certain frame rate and shutter speed combinations, which rules it out as a reliable primary source for on-camera lighting. Where it performs well is as a long-running background, ambient, or utility source — supporting environments where color rendering demands are moderate and operational cost over time is the primary consideration. The 10-pack format reinforces its value proposition for bulk fixture replacement or stocking a supply of warm utility lamps across a studio or production facility.

Key Features

Lumens: 580

Base Type: G23

Life Hours: 10,000

Watts: 9W

Color Temperature: 2700K

Specifications

Model
21272 / CF9DS/827/ECO
Wattage
9W
Lumens
580
Color Temperature
2700K (Warm White)
CRI
82
Base Type
G23 (2-Pin)
Lamp Type
Single Tube Compact Fluorescent
Rated Life
10,000 hours
Dimmable
No
Pack Quantity
10
Compliance
TCLP, RoHS
Brand
Sylvania

Pros & Cons

👍 Pros

  • 9-watt consumption versus an incandescent equivalent delivers significant energy savings in multi-fixture utility and ambient lighting setups running extended hours.
  • 10,000-hour rated lifespan reduces replacement frequency in hard-to-access fixtures or high-lamp-count studio utility environments.
  • 2700K warm white color temperature reads naturally in mixed practical lighting environments and pairs well with tungsten-balanced sources.
  • 10-lamp pack format offers favorable per-unit cost for studios, production spaces, or workspaces outfitting multiple fixtures at once.
  • RoHS and TCLP compliance signals reduced mercury content relative to older CFL designs — relevant for responsible disposal in professional environments.

👎 Cons

  • CRI of 82 falls short of the CRI 90+ benchmark required for critical color work — color accuracy under this lamp will show measurable deviation on camera or for detailed product examination.
  • Not dimmable — incompatible with standard dimmer switches, which limits creative intensity control and rules it out for fixtures on dimmable circuits.
  • G23 2-pin base has limited fixture compatibility; it will not fit standard medium screw-base or GU10 sockets without an adapter.
  • Fluorescent sources are prone to flicker artifacts in video capture at certain frame rates and shutter speeds, making this lamp unsuitable as a primary on-camera production light.
  • CFL lamps require a brief warm-up period to reach full output — not ideal for fixtures where instant full brightness is needed.

Frequently Asked Questions

The CRI is rated at 82. That means roughly 82% fidelity to a reference illuminant — acceptable for general ambient and fill applications, but below the CRI 90+ threshold that critical color grading or product photography work typically demands. Skin tones will read reasonably but may show a slight green-magenta shift depending on the camera's white balance response to CFL sources.
No — the CF9DS is not dimmable. Running it on a dimmer circuit designed for incandescent or LED loads can cause flickering, buzzing, and premature lamp failure. It should be used only on standard non-dimming circuits.
The lamp uses a G23 2-pin base — a two-pin inline base common in compact single-tube CFL fixtures, desk lamps, and specialty utility sockets. Confirm your fixture accepts G23 before ordering; it is not interchangeable with GX23, 2G7, or standard screw-base sockets.
Like all fluorescent sources, the CF9DS operates on AC line frequency. At standard US 60Hz power, you may encounter banding or flicker in video capture depending on your frame rate and shutter speed. Shutter speeds aligned to 1/60s or 1/120s minimize this, but this lamp is not recommended as a primary on-camera light source for video production.
At average daily use of 8 hours, 10,000 hours translates to roughly 3.4 years of continuous operation per lamp — a meaningful improvement over incandescent alternatives. The 10-pack format makes it practical to stock and rotate replacements in multi-fixture utility setups.

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