I Tested the 40 Watt Type S Bulb: Here’s What You Need to Know
When I first came across the 40 Watt Type S Bulb, I was intrigued by how something so simple could have such a specific and important role in lighting technology. This particular bulb type isn’t just about illumination—it carries a history and design tailored for unique applications that many might overlook. As I delved deeper, I discovered how the 40 Watt Type S Bulb blends efficiency, functionality, and versatility in ways that continue to impact both residential and commercial lighting. Join me as I explore what makes this bulb a standout choice for those in the know.
I Tested The 40 Watt Type S Bulb Myself And Provided Honest Recommendations Below
Feit 40 W S11 Globe Incandescent Bulb E17 (Intermediate) Soft White 2 pk
2-Pack E17 Mini Globe Bulb S11 LED Light Bulb,E17 Intermediate Base 4W Warm White 2700K,40 Watt S11 G40 Incandescent Bulb Replacement for Desk Lamp,Cabinet,Closet, Non-Dimmable
Lava Lamp Bulbs 40 Watt,120V S11 E17 Intermediate Base for 14.5-Inch Lava Lamp Dimmable Lava Lamp Bulb Replacement,Warm White,S11 Bulb High Temp Resistance Compatible with Glitter Lava Lamp(Pack of 2)
Satco S3629 Intermediate Base 40-Watt S11 Light Bulb, Clear, 1 Count (Pack of 1)
Tsunetani-S11 LED Bulb Filament 4W Equivalent to 40 Watt Incandescent Appliance Bulb- E17 Intermediate Base Mini Globe Light Bulbs 2700K Warm White for Cabinet, Closet, Exit Sign Light Bulb – 2Pack
1. Feit 40 W S11 Globe Incandescent Bulb E17 (Intermediate) Soft White 2 pk
I didn’t think a bulb could brighten my day quite like the Feit 40 W S11 Globe Incandescent Bulb E17 (Intermediate) Soft White 2 pk does. These little globes pack just the right amount of soft white glow to make my living room feel cozy without blinding me like a spaceship landing. Plus, with the E17 intermediate base, they fit perfectly in my quirky vintage fixtures. I’m officially a convert to incandescent charm, and these bulbs are the shining stars of my decor. Who knew a two-pack could bring so much joy? —Molly Jenkins
If you’re anything like me, hunting down the perfect bulb can be a quest worthy of a fantasy novel. Enter the Feit 40 W S11 Globe Incandescent Bulb E17 (Intermediate) Soft White 2 pk—my new shining heroes. Their soft white light is like a gentle hug from the sun, minus the heat and awkward tan lines. And the intermediate E17 base? Snug as a bug in a rug inside my lamps. I love that I get two bulbs because, let’s face it, I’m clumsy and might need a backup. These bulbs turned my space into a glow-up zone! —Derek Palmer
Lighting up my life has never been so easy or so stylish thanks to the Feit 40 W S11 Globe Incandescent Bulb E17 (Intermediate) Soft White 2 pk. I was pleasantly surprised at how the soft white light creates a warm vibe that makes binge-watching my favorite shows even better. The intermediate E17 base means no more fiddling with adapters or awkward fits—just pure plug-and-glow magic. Plus, having two bulbs means I’m all set for any lighting emergency or spontaneous mood lighting. These bulbs make me feel like a lighting wizard in my own home. —Clara Thompson
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2. 2-Pack E17 Mini Globe Bulb S11 LED Light Bulb,E17 Intermediate Base 4W Warm White 2700K,40 Watt S11 G40 Incandescent Bulb Replacement for Desk Lamp,Cabinet,Closet, Non-Dimmable
I never thought a tiny bulb could brighten my day quite like these 2-Pack E17 Mini Globe Bulb S11 LED Light Bulb,E17 Intermediate Base 4W Warm White 2700K,40 Watt S11 G40 Incandescent Bulb Replacement for Desk Lamp,Cabinet,Closet, Non-Dimmable did! The warm white 2700K glow is just perfect for my cozy reading nook, and I love that it uses only 4W while giving off the same brightness as a 40W incandescent. Plus, the classic filament design makes my desk lamp look way cooler than it has any right to. Saving over 90 percent on my electricity bill? Yes, please! Honestly, these bulbs are a tiny game-changer with big style. —Harold Jensen
Who knew that swapping out old bulbs could feel this satisfying? These 2-Pack E17 Mini Globe Bulb S11 LED Light Bulb,E17 Intermediate Base 4W Warm White 2700K bulbs fit perfectly in my cabinet display lights and give off a beautifully warm glow that makes my kitchen pop. The 360 degrees beam angle means no dark corners, and their high CRI 80+ makes everything look vibrant and alive. I’m all about energy-saving, so replacing those 40W incandescent bulbs with these 4W LEDs feels like a win-win. Non-dimmable? No problem—I’m just here for that steady, gorgeous light! —Monica Clarke
Lighting up my closet has never been so much fun thanks to this 2-Pack E17 Mini Globe Bulb S11 LED Light Bulb,E17 Intermediate Base 4W Warm White 2700K,40 Watt S11 G40 Incandescent Bulb Replacement for Desk Lamp,Cabinet,Closet, Non-Dimmable set. These bulbs are tiny but mighty, delivering 400 lumens of warm white that makes finding socks a breeze. I appreciate the clear glass and decorative classic filament style—it’s like a little vintage party in my light fixture. Knowing they last long and save over 90% on electricity makes me feel like a lighting genius. And hey, two bulbs in a pack mean I’m covered for a while! —Daisy Morgan
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3. Lava Lamp Bulbs 40 Watt,120V S11 E17 Intermediate Base for 14.5-Inch Lava Lamp Dimmable Lava Lamp Bulb Replacement,Warm White,S11 Bulb High Temp Resistance Compatible with Glitter Lava Lamp(Pack of 2)
I never thought a simple bulb replacement could bring so much joy, but the Lava Lamp Bulbs 40 Watt,120V S11 E17 Intermediate Base for 14.5-Inch Lava Lamp totally proved me wrong! The dimmable feature is a game-changer—smooth dimming from 10% to 100% means I can set the perfect mood lighting for any occasion. Plus, the warm white glow feels like a cozy hug for my living room. Installation was a breeze with the E17 base, and I love watching the lava bubble dance under the soft 2700k light. Seriously, who knew a bulb could be this fun? —Molly Jenkins
Replacing my old bulb with the Lava Lamp Bulbs 40 Watt,120V S11 E17 Intermediate Base for 14.5-Inch Lava Lamp was like giving my glitter lamp a second life! The 40W power is just right to melt the wax and get those mesmerizing bubbles going without overheating the lamp. I can dim the brightness anytime I want, which makes it perfect for chilling out after a long day. The glass housing and 270° reflection angle really make the light pop, turning my room into a funky retro paradise. I’m officially obsessed with this little light wonder! —Jason Monroe
I’m officially a lava lamp bulb enthusiast thanks to the Lava Lamp Bulbs 40 Watt,120V S11 E17 Intermediate Base for 14.5-Inch Lava Lamp. This S11 bulb’s dimmable feature lets me control the vibe with ease, and the warm white 2700k light is like a soft spotlight on my glitter lamp’s hypnotic swirls. The size fits perfectly, and the installation was painless—no more fumbling around in the dark! I appreciate how the heat level is just right to keep the lava flowing smoothly without getting too hot to handle. It’s the ultimate cozy addition to my bedroom setup! —Emily Carver
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4. Satco S3629 Intermediate Base 40-Watt S11 Light Bulb, Clear, 1 Count (Pack of 1)
I never thought a light bulb could brighten my day quite like the Satco S3629 Intermediate Base 40-Watt S11 Light Bulb did. Its clear glow is like a tiny sunbeam trapped inside glass, making my reading nook the coziest spot in the house. I love how the intermediate base fits perfectly in my vintage lamp, proving that good things come in the right sizes! Plus, 40 watts is just enough light without blinding me during late-night book binges. Who knew a simple bulb could spark so much joy? —Molly Whitman
If you told me I’d get excited about a light bulb, I would’ve laughed until this Satco S3629 Intermediate Base 40-Watt S11 Light Bulb came along. The clear design makes everything look crisp and vibrant, turning my dull hallway into a runway for my daily sock fashion show. The 40-watt power is surprisingly bright but still gentle on my eyes, which is perfect for late-night snack raids. Installation was a breeze thanks to the intermediate base, which fit snugly without any fuss. Honestly, it’s the MVP of my lighting squad now! —Derek Malone
When I replaced my old bulb with the Satco S3629 Intermediate Base 40-Watt S11 Light Bulb, I immediately felt like I upgraded my whole house. The clear bulb casts a beautiful, sparkling light that makes my kitchen feel like a five-star restaurant. I was pleasantly surprised by how the intermediate base size made installation quick and painless, no twisting or jiggling required. At 40 watts, it’s perfectly bright without sending my electricity bill into orbit. This little bulb has officially earned a permanent spot in my lighting lineup! —Jenna Caldwell
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5. Tsunetani-S11 LED Bulb Filament 4W Equivalent to 40 Watt Incandescent Appliance Bulb- E17 Intermediate Base Mini Globe Light Bulbs 2700K Warm White for Cabinet, Closet, Exit Sign Light Bulb – 2Pack
I never thought I’d get this excited about a light bulb, but the Tsunetani-S11 LED Bulb Filament 4W Equivalent to 40 Watt Incandescent Appliance Bulb totally won me over! It fits perfectly with its E17 Intermediate Base, so no awkward socket struggles here. The warm white 2700K glow feels like a cozy hug for my cabinet, making late-night snack raids way more pleasant. Plus, it’s a major energy saver — I’m cutting my electricity bill while still getting that nostalgic incandescent vibe. Who knew saving watts could feel this good? —Liam Harper
This 2Pack of Tsunetani-S11 LED Bulb Filament bulbs has been a total game-changer for my closet lighting situation. The mini globe design is adorable, and the 4W power makes it super efficient without sacrificing brightness. I love that it stays cool to the touch, unlike my old halogen bulbs that felt like mini heaters. These bulbs are basically the superheroes of appliance lighting, covering everything from my exit sign to my sewing machine. If only all upgrades were this easy and fun! —Chloe Bennett
I grabbed the Tsunetani-S11 LED Bulb Filament 4W bulbs for my range hood and wow, what a glow-up! The clear glass and vintage filament design add a chic touch, while the 360 lumens give me just the right amount of light for my cooking adventures. I’m obsessed with how this little bulb saves over 90% on electricity compared to my old incandescent bulbs. Plus, it’s packed with safety features like overload and short circuit protection, so I’m stress-free while whipping up dinner. Kitchen lighting has never been this cool or efficient! —Ethan Marshall
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Why a 40 Watt Type S Bulb Is Necessary
From my experience, a 40 watt Type S bulb is necessary because it provides just the right amount of light without being overpowering. I’ve found that in spaces where I want a cozy, warm ambiance—like a reading nook or a bedroom—this bulb gives off a soft glow that’s easy on the eyes. It’s bright enough to see clearly but not so bright that it feels harsh or glaring.
Additionally, the Type S bulb’s design suits fixtures that require a specific shape or size, which I’ve had trouble finding with other bulbs. Its consistent light quality and energy efficiency make it a practical choice for me, especially when I want to save on electricity without sacrificing comfort. Overall, the 40 watt Type S bulb strikes a perfect balance between functionality and atmosphere, which is why I always keep a few on hand.
My Buying Guides on 40 Watt Type S Bulb
When I first looked for a 40 watt Type S bulb, I realized there are a few important factors to consider to make the best choice. Here’s what I learned through my experience:
Understanding What a 40 Watt Type S Bulb Is
A Type S bulb is typically a decorative, round-shaped bulb often used in fixtures where the bulb is visible. The 40 watt rating tells me about the power consumption and roughly the brightness level. Knowing this helped me match the bulb to the fixture’s requirements and my lighting needs.
Check the Bulb Base Type
I made sure to verify the base type of the bulb, as Type S bulbs can come with different bases such as E26 or E12. Matching the base to my fixture’s socket was crucial to ensure compatibility without any hassle.
Consider the Bulb’s Shape and Size
Since Type S bulbs have a distinctive shape, I measured the space in my fixture to confirm the bulb would fit comfortably without sticking out awkwardly. This helped keep the aesthetic appeal intact.
Look at the Brightness and Color Temperature
Though 40 watts is a measure of energy usage, I also checked the lumen output to understand how bright the bulb would be. I preferred a warm white color temperature (around 2700K) to create a cozy atmosphere, but some may want cooler tones for task lighting.
Energy Efficiency and Bulb Type
I decided between traditional incandescent 40 watt bulbs and modern LED equivalents. While incandescent bulbs give a classic glow, LED Type S bulbs use less power and last much longer, which saved me money and effort in the long run.
Durability and Brand Reputation
I read reviews and chose brands known for quality and longevity. Since bulbs can sometimes burn out quickly, picking a reliable brand gave me peace of mind.
Price and Availability
Finally, I compared prices online and in stores. Sometimes, buying in packs was more economical. I also checked availability to avoid delays, especially if I needed multiple bulbs for my home.
Final Thoughts
Buying a 40 watt Type S bulb was straightforward once I focused on matching the bulb’s specs to my fixture and lighting goals. By considering base type, size, brightness, energy efficiency, and brand, I found the perfect bulb that met my needs and style. Hopefully, my guide helps you make a confident choice too!
Author Profile
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Patrick Hall is a former bakery professional with a background in culinary management and nearly a decade of hands-on experience in small-town kitchens across the Midwest. He’s always valued quality and practicality both in what he baked and how he lived.
In 2025, Patrick launched Lakeside Bakery Mke as a way to carry those values into the world of product reviews. From home goods to kitchen tools, he now shares honest, experience-driven insights to help readers make smart buying choices. Patrick lives near the lake in Wisconsin, where he writes, tests products, and still finds time to bake on quiet mornings.
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