SATCO Lighting S9577 2.5W ST19 LED, Transparent Amber, Medium Base, 2000K, 220 Lumens, 120V

Yes. The S9577 carries a Wet location rating and is listed for both indoor and outdoor use, so it can go in an exposed porch fixture, a string light, or a covered walkway sconce. It is also an enclosed rated lamp, so a sealed globe or lantern fixture that traps heat won't shorten its life.

The S9577 is a dimmable lamp running at 120V, 60Hz and drawing only 0.021A at 2.5 watts. That tiny load is the thing to watch: older magnetic or high-minimum-load dimmers often need more current than a single 2.5W lamp provides, which shows up as flicker or drop-out at the low end. On an LED-rated dimmer, or with several of these on the same circuit, it dims normally.

Plan on 25W incandescent brightness, not more. The S9577 is rated as a 25W equivalent at 220 lumens and 2.5 watts. The amber glass cuts output on purpose, so this is a decorative, low-glare lamp for exposed-bulb fixtures. If you need it to actually light a room, you want a clear or frosted lamp at a higher lumen output.

Noticeably warmer and more orange. At 2000K this lamp sits well below the 2700K soft white most residential and hospitality fixtures run, and the transparent amber glass pushes it further toward candlelight. It will not blend in a fixture shared with 2700K lamps. Standardize a whole run of fixtures on it, or use it where the warm tone is the point, like restaurant pendants, cafe string lighting, or lobby sconces. CRI is 80.

Any orientation. Burning position is universal, so base-up in a downward pendant, base-down in an upturned sconce, or horizontal in a wall bracket all work the same. Beam spread is 360 degrees, which is what you want for an exposed filament fixture where the bulb is seen from all sides.

It is an LED filament lamp with a glass body and transparent amber lensing, so the filament strands are visible through the glass the way they are in a vintage Edison bulb. That is the reason to spec it in open fixtures where the bulb itself is part of the design.

Rated at 15,000 average hours. On a dusk-to-dawn exterior schedule of roughly 12 hours a day that works out to a bit over three years of service, so it is a reasonable standardization choice for a property running a lot of decorative exposed-bulb fixtures.

No. The S9577 is not DLC approved, so it will not qualify under programs that require a DesignLights Consortium listing. It is FCC compliant and noted as lawful for sale in California. For a rebate-driven retrofit, specify a DLC-listed lamp instead and keep this one for the decorative openings.

Neither. It is a fixed 2000K lamp with no selectable CCT and no three-way function, so it will run at full output in a three-way socket regardless of switch position. If you need multiple light levels, use it on a dimmer instead.