--- product_id: 1001518 title: "Sylvania 24683 - F40DSGN50-40 Watt T12 5000K Full Spectrum Fluorescent Light Bulb, 4 Foot Length, (Pack Of 4)" brand: "osram" price: "Β₯40622" currency: JPY in_stock: true reviews_count: 8 category: "Osram" url: https://www.desertcart.jp/products/1001518-sylvania-24683-f40dsgn50-40-watt-t12-5000k-full-spectrum-fluorescent store_origin: JP region: Japan --- # 20,000 hours lifespan 5000K full spectrum daylight 40W power efficiency Sylvania 24683 - F40DSGN50-40 Watt T12 5000K Full Spectrum Fluorescent Light Bulb, 4 Foot Length, (Pack Of 4) **Brand:** osram **Price:** Β₯40622 **Availability:** βœ… In Stock ## Summary > πŸ’‘ Light up your life with brilliance that lasts! ## Quick Answers - **What is this?** Sylvania 24683 - F40DSGN50-40 Watt T12 5000K Full Spectrum Fluorescent Light Bulb, 4 Foot Length, (Pack Of 4) by osram - **How much does it cost?** Β₯40622 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/1001518-sylvania-24683-f40dsgn50-40-watt-t12-5000k-full-spectrum-fluorescent) ## Best For - osram enthusiasts ## Why This Product - Trusted osram brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **True Color Accuracy:** High CRI of 90 ensures colors pop vividly, perfect for design, office, or creative spaces. - β€’ **Hassle-Free Replacement:** Standard 4-foot T12 tubular design with G13 base fits seamlessly into existing fixturesβ€”no upgrades needed. - β€’ **Long-Lasting Performance:** Save time and money with an impressive 20,000-hour lifespan that keeps your environment lit for years. - β€’ **Power-Efficient Lighting:** 40 watts of optimized power consumption delivers bright 2200 lumens without the energy guilt. - β€’ **Brilliant Full Spectrum Glow:** Experience crisp, natural daylight with 5000K color temperature that energizes your workspace. ## Overview The Sylvania 24683 F40DSGN50 is a 40-watt, 4-foot T12 fluorescent tube delivering 2200 lumens of full spectrum 5000K daylight with a high CRI of 90. Designed for indoor use, it offers a rapid start and an extended 20,000-hour lifespan, making it an energy-efficient, reliable lighting solution for professional and home environments alike. ## Description 40 watt 48" T12 Medium Bi-Pin (G13) Base Designer 5,000K Rapid Start Fluorescent Sylvania Light Bulb Review: Beautiful light, perfect as an extra light for house plants - I just set up some shelving for some indoor tropical plants. The room is a bedroom with some good light for a few hours in the afternoon. I needed some constant bright light. I bought two of these bulbs and the work beautifully as a continual light source I addition to the natural sun I have. I wouldn't recommend them as a light source by itself in dark rooms, but if they are adding light, they are fine. The light is a neutral color, nog too blue of yellow. She shipping was fast and the bulbs can in one piece. Review: Nice Clear Lights - The bulbs arrived early and undamaged. I am an amateur photographer and I was looking for a crisp natural light to really see my prints in the clearest possible way and I believe this does the job perfectly. I know they say that with a 6500K the lighting is closer to natural sunlight but when I used other bulbs I could see a blue or pink tint in the light. I use 4 bulbs and the 2200 lumens output is plenty of light for a 10’ X 13’ room and with the 20000 hours of life they will be around for a while. I would and do recommend these bulbs to others. ## Features - Color Temperature: 5,000K - Average Lifetime: 20000 hours - Lumens (light output): 2200 - CRI: 90 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00IISC2W0 | | Additional Features | Full Spectrum | | Best Sellers Rank | #124,149 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #614 in Fluorescent Tubes | | Brand | OSRAM | | Brand Name | OSRAM | | Bulb Base | G13 | | Bulb Shape Size | T8 | | Color | 5000k Full Spectrum | | Color Rendering Index | 50 | | Color Temperature | 5000 Kelvin | | Connectivity Technology | Normal bulb | | Control Method | App | | Controller Type | Push Button | | Customer Reviews | 4.1 out of 5 stars 417 Reviews | | Indoor Outdoor Usage | Indoor | | Item Dimensions W x H | 7"W x 7"H | | Item Weight | 2.9 pounds | | Light Color | Cool Daylight White | | Light Source Operating Life | 20000 hours | | Light Source Type | Fluorescent | | Light Source Wattage | 40 watts | | Light Type | Fluorescent | | Manufacturer | Osram Sylvania | | Manufacturer Part Number | 24683 | | Material Type | copper | | Model Number | 24683 | | Number of Items | 1 | | Package Quantity | 1 | | Power Consumption | 40 watts | | Shape | Tubular(T) | | Special Feature | Full Spectrum | | Specific Uses For Product | Indoor | | UPC | 046135246838 | | Unit Count | 4 Count | | Voltage | 120 volts | | Wattage | 40 watts | | White Brightness | 2200 lumens | ## Product Details - **Brand:** OSRAM - **Light Type:** Fluorescent - **Special Feature:** Full Spectrum - **Wattage:** 40 watts - **Bulb Base:** G13 ## Images ![Sylvania 24683 - F40DSGN50-40 Watt T12 5000K Full Spectrum Fluorescent Light Bulb, 4 Foot Length, (Pack Of 4) - Image 1](https://m.media-amazon.com/images/I/51o3dnjUItL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Beautiful light, perfect as an extra light for house plants *by B***G on May 3, 2014* I just set up some shelving for some indoor tropical plants. The room is a bedroom with some good light for a few hours in the afternoon. I needed some constant bright light. I bought two of these bulbs and the work beautifully as a continual light source I addition to the natural sun I have. I wouldn't recommend them as a light source by itself in dark rooms, but if they are adding light, they are fine. The light is a neutral color, nog too blue of yellow. She shipping was fast and the bulbs can in one piece. ### ⭐⭐⭐⭐⭐ Nice Clear Lights *by M***L on February 27, 2015* The bulbs arrived early and undamaged. I am an amateur photographer and I was looking for a crisp natural light to really see my prints in the clearest possible way and I believe this does the job perfectly. I know they say that with a 6500K the lighting is closer to natural sunlight but when I used other bulbs I could see a blue or pink tint in the light. I use 4 bulbs and the 2200 lumens output is plenty of light for a 10’ X 13’ room and with the 20000 hours of life they will be around for a while. I would and do recommend these bulbs to others. ### ⭐⭐⭐⭐⭐ Very happy with the product! *by V***R on February 1, 2021* Arrived quickly and just installed. The bulbs came in cardboard sheaths surrounded in bubble wrap. The prongs were encased in protective plastic. All perfect. Just pull out the sheaths and gently remove plastic off the prongs. They fit my 4’ older fixtures perfectly. Had to fiddle and turn a bit to connect correctly, but voila! Light! I previously had 5000K daylight bulbs, but these seem somewhat cooler and brighter. Perhaps mine were aging. I don’t know what the CRI was in my older ones, but happy these are a 90. I am a painter and was having trouble with the lighting in my studio. Anything between 5000K-6000K (color temperature) and 80-100 CRI (color rendering index) is recommended for good studio light. This was much cheaper than ordering fancy studio lighting where you need to change ballasts for T8 lights. And those were $130-40 for 4 lights! Very happy so far. ## Frequently Bought Together - Sylvania 24683 - F40DSGN50-40 Watt T12 5000K Full Spectrum Fluorescent Light Bulb, 4 Foot Length, (Pack Of 4) - SYLVANIA (4 Pack) F20T12/D - 20 Watt - T12-24 inch - Daylight 6500K Fluorescent Tube - LUXRITE F32T8/865 32W 48 Inch T8 Fluorescent Tube Light Bulb, 6500K Daylight, 2800 Lumens, G13 Medium Bi-Pin Base, LR20735, 4-Pack --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/1001518-sylvania-24683-f40dsgn50-40-watt-t12-5000k-full-spectrum-fluorescent](https://www.desertcart.jp/products/1001518-sylvania-24683-f40dsgn50-40-watt-t12-5000k-full-spectrum-fluorescent) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-08*