GoodBulb F21T5/850 21W Fluorescent Light Bulb: Legacy Daylight Performance in a Compact Form
34-inch T5 Fluorescent Light Bulb with a miniature bi-pin G5 base. Emitting 2,100 lumens at 5000 Kelvin Pure White (Daylight), this high-efficiency tube delivers crisp, vibrant light—ideal for task lighting, detail work, and commercial environments where clarity matters. With a long-lasting 36,000-hour rated life, it provides reliable performance in compact fixtures for years to come.

Why 5000K Pure White?
The 5000K color temperature mimics natural daylight, offering sharp, high-contrast illumination that boosts alertness and enhances accuracy—perfect for functional spaces.

✔ Workshops & Garages – Great for task lighting and true color visibility.
✔ Retail & Display Areas – Enhances product presentation and color accuracy.
✔ Utility Rooms & Offices – Delivers bright, clean light that keeps productivity high.

Slim Design. Strong Performance.

✔ 2,100 Lumen Output – Bright, daylight-style illumination in a compact footprint.
✔ 36,000-Hour Rated Life – Reduces downtime and replacement costs.
✔ T5 Narrow Profile – Ideal for space-saving modern fixtures.
✔ Miniature Bi-Pin G5 Base – Standard compatibility for 34-inch T5 fluorescent systems.

Fluorescent Lit the Way—LED Lights the Future
While F21T5/850 tubes have delivered reliable daylight-style lighting, LED technology now offers greater efficiency, longevity, and ease of maintenance.

Why Switch to LED?

✔ Up to 86% Energy Savings – Significantly lower energy costs.
✔ Flicker-Free, Instant-On Light – No warm-up, buzzing, or delay.
✔ 5–10X Longer Lifespan – Reduce labor and replacement frequency.
✔ No Mercury – Safer to handle, safer for the environment.
✔ Eliminate Ballast Maintenance – LED bypass options simplify your lighting system.

LED Retrofit Options – Daylight the Smart Way

🔹 Plug & Play LED (Type A) – Compatible with most electronic ballasts.
🔹 Ballast Bypass LED (Type B) – Connects directly to line voltage—no ballast needed.
🔹 Hybrid LED (Type A+B) – Operates with or without a ballast for maximum flexibility.

Recycle Fluorescent Bulbs Responsibly
Fluorescent lamps contain mercury and must be properly recycled. GoodBulb offers a safe, simple solution:

✅ Prepaid Recycling Boxes – Pack, seal, and send—easy and EPA-compliant.
✅ Certified Disposal – Prevent mercury from entering landfills.
✅ Certificate of Recycling – Official documentation of proper handling.

Upgrade Today for a Brighter Tomorrow
Your F21T5/850 bulbs have done the job—but LED lighting does it better. Brighter, longer-lasting, and better for your bottom line.

Explore our LED T5 retrofit solutions or contact a GoodBulb specialist today to find the perfect replacement for your 5000K fixtures. Let’s move your lighting forward.