---
product_id: 51812846
title: "Sylvania 18\" T8 Preheat Fluorescent Linear Tube Lamp, 15W, Premium Cool White Phosphor, 4100K, 70 CRI - 1 Pack (21603)"
brand: "ledvance"
price: "186 Lei"
currency: RON
in_stock: true
reviews_count: 11
category: "Ledvance"
url: https://www.desertcart.ro/products/51812846-sylvania-18-t8-preheat-fluorescent-linear-tube-lamp-15w-premium
store_origin: RO
region: Romania
---

# 7,500 hours lifespan 15W energy efficient 900 lumens brightness Sylvania 18" T8 Preheat Fluorescent Linear Tube Lamp, 15W, Premium Cool White Phosphor, 4100K, 70 CRI - 1 Pack (21603)

**Brand:** ledvance
**Price:** 186 Lei
**Availability:** ✅ In Stock

## Summary

> 💡 Illuminate smarter, work brighter — don’t get left in the dark!

## Quick Answers

- **What is this?** Sylvania 18" T8 Preheat Fluorescent Linear Tube Lamp, 15W, Premium Cool White Phosphor, 4100K, 70 CRI - 1 Pack (21603) by ledvance
- **How much does it cost?** 186 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/51812846-sylvania-18-t8-preheat-fluorescent-linear-tube-lamp-15w-premium)

## Best For

- ledvance enthusiasts

## Why This Product

- Trusted ledvance brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Energy Smart Choice:** Consumes only 15 watts while replacing a 60W incandescent equivalent, saving on energy bills.
- • **Seamless Installation:** Standard G12 medium B-pin base fits most fixtures for quick, no-fuss upgrades.
- • **Trusted Legacy Lighting:** Backed by SYLVANIA’s 100+ years of lighting innovation for quality you can count on.
- • **Long-Lasting Performance:** Enjoy up to 7,500 hours of reliable illumination—less hassle, more productivity.
- • **Brighten Your Space Efficiently:** Delivers 900 lumens of crisp, cool white light at 4100K for a professional ambiance.

## Overview

The Sylvania 18" T8 Preheat Fluorescent Tube Lamp offers a powerful 900 lumen output with a cool white 4100K color temperature and a CRI of 70 for clear, natural lighting. Designed for indoor use, it runs efficiently at 15 watts with a long lifespan of 7,500 hours, making it a cost-effective and reliable lighting solution trusted by professionals and homeowners alike.

## Description

SYLVANIA G12 Medium B-Pin T8 linear fluorescent lamps offer a cost-effective solution for general purpose fluorescent lighting applications. These frosted lamps deliver good color rendering (CRI 70), lumen maintenance and long life of 7,500 hours. With a color temperature of 2100K and brightness of 900 lumens, experience quality lighting only by SYLVANIA with 100+ years in lighting innovation.

Review: Works Great - This item worked fine for me. It installed easily and provided a pleasant light just like the previous ones I have installed in my bathroom mirror fixture thru the years.
Review: Works as you would expect - Bought 2 because the price was fantastic. Oops, it'll be a while before I even need to use the second.

## Features

- SYLVANIA G12 Medium B-Pin T8 linear fluorescent lamps offer a cost-effective solution for general purpose fluorescent lighting applications.
- These frosted lamps deliver good color rendering (CRI 70), lumen maintenance and long life of 7,500 hours.
- With a color temperature of 2100K and brightness of 900 lumens, experience quality lighting only by SYLVANIA with 100+ years in lighting innovation.
- Includes one 15W, 18" T8 linear fluorescent lamp.
- Power source type: AC/DC.
- Not for Sale in CA, CO, OR, RI.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002EIZFHO |
| Accepted voltage frequency | 100 to 120 Volts and 60 Hertz |
| Assembled Diameter | 1.09 Inches |
| Average Life | 7500 Hours |
| Batteries Required? | No |
| Best Sellers Rank | #128,163 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #817 in Fluorescent Tubes |
| Brand | LEDVANCE |
| Brightness | 900 Lumen |
| Bulb Base | G12 |
| Bulb Shape Size | T8 |
| Color | Frosted |
| Color Rendering Index | 70.0 |
| Color Temperature | 4100 Kelvin |
| Control Method | App |
| Customer Reviews | 4.3 4.3 out of 5 stars (978) |
| Cutting Diameter | 1.09 Inches |
| Date First Available | September 20, 2007 |
| Efficiency | 60 lumens per watt |
| Finish | Frosted |
| Incandescent Equivalent Wattage | 60 Watts |
| Included Components | 1 Bulb |
| Indoor/Outdoor Usage | Indoor |
| Item Package Quantity | 1 |
| Item Weight | 2.4 ounces |
| Item model number | 21603 |
| Light Color | Bright White |
| Light Output Maximum | 900 Lumens |
| Light Source Type | Fluorescent |
| Light Source Wattage | 15 Watts |
| Light Type | Fluorescent |
| Manufacturer | LEDVANCE |
| Material | Glass |
| Model Name | 21603 |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | 21603 |
| Power Consumption | 15 Watts |
| Power Source | Corded Electric |
| Product Dimensions | 1.1"W x 1.1"H |
| Shape | Tubular(T) |
| Size | 1 Count (Pack of 1) |
| Special Feature | Frosted |
| Special Features | Frosted |
| Specific Uses For Product | For indoor use only |
| UPC | 046135216039 |
| Unit Count | 1.0 Count |
| Voltage | 120 Volts |
| Warranty Description | For us & canadian customer questions or support please call us at 1-800-lightbulb (1-800-544-4828). |
| Wattage | 15 watts |
| White Brightness | 900 Lumens |

## Product Details

- **Brand:** LEDVANCE
- **Bulb Shape Size:** T8
- **Light Type:** Fluorescent
- **Special Feature:** Frosted
- **Wattage:** 15 watts

## Images

![Sylvania 18" T8 Preheat Fluorescent Linear Tube Lamp, 15W, Premium Cool White Phosphor, 4100K, 70 CRI - 1 Pack (21603) - Image 1](https://m.media-amazon.com/images/I/41oPqf++tDS.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Great
*by M***S on August 24, 2025*

This item worked fine for me. It installed easily and provided a pleasant light just like the previous ones I have installed in my bathroom mirror fixture thru the years.

### ⭐⭐⭐⭐⭐ Works as you would expect
*by D***. on June 18, 2025*

Bought 2 because the price was fantastic. Oops, it'll be a while before I even need to use the second.

### ⭐⭐⭐⭐⭐ Great under cabinet light
*by L***I on August 21, 2021*

I have trouble seeing in low light, so my landlord installed under cabinet lights for me in my kitchen so I could prepare food and wash dishes more easily. The lights he put in were great, but still kind of dim, so depending on where I was or what angle I was using, it was still sometimes difficult and I would have to turn on all my kitchen lights. I bought this bulb when my over sink bulb blew. I went with this one, because Sylvania is a popular brand that I have heard of and I was hoping that would translate to a brighter bulb. I’ve never replaced a fluorescent bar light before. so I was wary of buying anything different than the F15T8 one that was in there before as I wasn’t able to find anything definitive online to tell the difference between wattage and length when determining what the “F” number indicated. I was very happy to find that this light is bright enough that I no longer need to turn on every light in my kitchen just to wash dishes or chop some veggies. I definitely recommend this bulb.

## Frequently Bought Together

- SYLVANIA 15W, 18" MOL, T8, Preheat Fluorescent Linear Tube Lamp, Premium Cool White Phosphor, 4100K, 70 CRI, 1 Count (Pack of 1), Frosted
- G E Lighting 2-Pack 64818 GE FS-2-C/TP Fluorescent Starter
- LEDVANCE 15W 18" T8 Linear Fluorescent Lamp, 4200K, 825 Lm, Non-Dimmable, Cool White - 1 Pack (21619)

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---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-03*