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Item #:
35628718
GoodBulb F21T5/835/ECO 21W 34 Inch T5 Fluorescent Light Bulb, 3500K Soft White Medium Bi-Pin Base, 2100 Lumens 85 CRI 36000 Life Hours,
89% of respondents would recommend this to a friend
Item #:
35628718
IMP 232
Price Details
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Order now and get it around Tuesday, September 29
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What Stands Out
Energy Efficiency
The GoodBulb 13-watt fluorescent light bulbs provide excellent luminosity while consuming less power, making them perfect for eco-conscious consumers seeking to reduce energy bills significantly.
Long Lifespan
With a robust 6000 hours of rated life, these bulbs minimize replacement frequency, ensuring lasting performance and convenience for homeowners and businesses alike.
Cool White Brightness
Offering 4100K color temperature, these bulbs deliver a bright, cool white light ideal for enhancing visibility in workspaces and living areas, improving overall productivity and comfort.
Product Details
| Light Type | Fluorescent |
| Additional Features | Energy Efficient |
| Wattage | 21.00 |
| Bulb Base | G13 |
| Incandescent Equivalent Wattage | 84 Watts |
| Specific Uses For Product | Commercial Lighting, Office Lighting |
| Light Color | Soft White |
| Voltage | 120 Volts |
| Color Temperature | 3500 Kelvin |
| Indoor Outdoor Usage | Indoor |
| Light Source Type | Fluorescent |
| Light Source Wattage | 21 Watts |
| Accepted Voltage Frequency | 100 to 120 Volts and 60 Hertz |
| Control Method | App |
| Efficiency | Energy Efficient |
| Controller Type | Push Button |
| Connectivity Technology | Normal bulb |
| Brand Name | GoodBulb |
| Number of Items | 40 |
| UPC | 605927079544 |
| Unit Count | 40.0 Count |
| Package Quantity | 1 |
| Material Type | copper |
| Shape | Tubular(T) |
| Style Name | F21T5 |
| Color | 3500k |
| Brand | GoodBulb |
| Special Feature | Energy Efficient |
| Item Weight | 4 lbs (1.81 kg) |
Who Should Buy?
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Office Spaces
Ideal for office environments needing bright illumination for productivity without overwhelming brightness or color distortion.
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Retail Lighting
Perfect for retail settings requiring consistent, cool white lighting to enhance product displays and customer engagement.
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Workshops
Great for workshops or garages, offering energy efficiency and durability while providing sufficient lighting for tasks.
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Home Use
Not ideal for residential use where warmer, softer lighting is preferred for comfort and aesthetics.
Product Description
GoodBulb F21T5/835/ECO 21W 34 Inch T5 Fluorescent Light Bulb, 3500K Soft White Medium Bi-Pin Base, 2100 Lumens 85 CRI 36000 Life Hours, Instant/Programmed Start (40 Pack)
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Customer Questions & Answers
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Question:
What is the color temperature of the GoodBulb F13T5641ECO light bulb?
Answer: The GoodBulb F13T5641ECO features a color temperature of 4100K, which produces a cool white light. This color temperature is ideal for environments requiring bright and clear illumination, promoting productivity and focus. It's perfect for office spaces, workshops, and homes where clear visibility is essential. -
Question:
What type of base does the GoodBulb F13T5641ECO light bulb use?
Answer: This light bulb utilizes a medium bi-pin base, making it compatible with various fixtures designed for T5 fluorescent bulbs. The bi-pin base simplifies installation since it can easily be inserted into standard sockets, allowing for hassle-free setup in a variety of lighting applications. -
Question:
How bright is the GoodBulb F13T5641ECO light bulb?
Answer: The GoodBulb F13T5641ECO emits 740 lumens, providing bright illumination for indoor spaces. This level of brightness is often recommended for work areas or task lighting, ensuring that you have sufficient lighting for activities like reading, crafting, or any detailed work. -
Question:
What is the color rendering index (CRI) of the GoodBulb F13T5641ECO bulb?
Answer: The CRI of the GoodBulb F13T5641ECO is 65. This rating illustrates how accurately the bulb renders colors compared to natural light. A CRI of 65 is suitable for environments such as retail or craft spaces where color precision is important. -
Question:
How long does the GoodBulb F13T5641ECO last?
Answer: The GoodBulb F13T5641ECO boasts an impressive lifespan of approximately 6000 life hours. This longevity means less frequent replacements, making it a cost-effective option for both home and commercial lighting needs, as you can enjoy extended use without sacrificing quality. -
Question:
Is the GoodBulb F13T5641ECO suitable for residential use?
Answer: Absolutely! The GoodBulb F13T5641ECO is well-suited for residential applications. Its cool white light is perfect for kitchens, studies, or garages where bright lighting is necessary. Homeowners will appreciate its efficiency and ability to illuminate spaces effectively. -
Question:
Can the GoodBulb F13T5641ECO bulb be used in commercial settings?
Answer: Yes, the GoodBulb F13T5641ECO is an excellent choice for commercial environments. Its high lumen output and cool white light improve visibility, making it ideal for offices, retail spaces, and workshops. Businesses can benefit from its efficiency and effective color rendering. -
Question:
What are the advantages of using fluorescent bulbs like the GoodBulb F13T5641ECO?
Answer: Fluorescent bulbs like the GoodBulb F13T5641ECO offer several advantages including energy efficiency, a longer lifespan, and reduced heat production compared to traditional incandescent bulbs. These factors make them an eco-friendly and cost-effective option for both home and business lighting. -
Question:
How do I install the GoodBulb F13T5641ECO bulb?
Answer: Installing the GoodBulb F13T5641ECO bulb is straightforward due to its medium bi-pin base. Simply power off the fixture, insert the pins into the designated slots of your T5 fixture, and secure it in place. Make sure to handle the bulb carefully to avoid breakage during installation. -
Question:
Where can I buy the GoodBulb F13T5641ECO 13-Watt T5 Fluorescent Light Bulb in Isle of Man?
Answer: You can purchase the GoodBulb F13T5641ECO 13-Watt T5 Fluorescent Light Bulb at Ubuy. Ubuy offers a wide selection of lighting solutions, making it easy for you to find this specific bulb and have it delivered conveniently to your location in Isle of Man.
GoodBulb Fluorescent Tubes Editorial Review
GoodBulb's fluorescent T5 light bulbs provide customers with a high luminous flux, making them more efficient than T8 and T12 bulbs. Customers asked about whether the bulbs would fit certain fixtures and whether a ballast was needed, and responded positively to the product. One customer praised the bulbs for the difference they made in lighting and visibility, another expressed satisfaction with the quality and packaging, and a third customer commended the company for a great product, a great cause, and great service. Reviewers reported receiving the product quickly and in good condition, with no physical damage. The bulbs were found to be a great value for the price, and some commented that they would order from GoodBulb again.
Customer Reviews & Ratings
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Pros
- High luminous flux
- Easy plug and play (for certain fixtures)
- Efficient
- Good value for the price
- Fast shipping
- Secure packaging
- Quality product
Cons
- May not fit certain fixtures, but customers were advised that they may be able to find the product in a different size.
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
H
Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
AC
Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
IMP 232
Order now and get it around Tuesday, September 29
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
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Fastest cross-border delivery
Features & Benefits
- High output with 740 lumens
- Commercial grade with premium quality components
- 6000+ hours of exceptional life rating
- Easy installation with medium bi-pin base
- Compatible with existing fixtures and ballasts
- GoodBulb supports a good cause with every purchase
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