Brands Guides About
Profoto 331528 Flashtube for B1 Monolight — main product image
Profoto

Profoto 331528 Flashtube for B1 Monolight

★★★★★4.0 (15 reviews)

Profoto 331528 replacement flashtube keeps your B1 Monolight firing with consistent, reliable output.

$205.00*
✓ In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

The Profoto 331528 Flashtube is the factory-specified replacement tube for the Profoto B1 Monolight, one of the most widely used battery-powered studio strobes in professional photography. Flash tubes are consumable components that degrade over time — output becomes inconsistent, color temperature drifts, and eventually the tube fails entirely. Having a genuine replacement on hand means minimal downtime, whether you're working in a studio or on location.

Weighing just 3.2 ounces with compact 3 x 5 x 3-inch packaging, the tube is easy to store in a gear bag as a backup. Because it is a genuine Profoto component, it maintains the precise color temperature and flash consistency that the B1 system is known for. Installation follows the B1's standard tube-replacement procedure. For photographers who rely on the B1 Monolight for critical work, keeping a spare flashtube is a practical way to protect against unexpected equipment failure during a shoot.

Key Features

Profoto Flashtube for B1 Monolight

Specifications

Compatibility
Profoto B1 Monolight
Item Weight
3.2 ounces
Product Dimensions
3 x 5 x 3 inches
Included Components
Flash tube
Brand
Profoto
Model Number
331528

Pros & Cons

👍 Pros

  • Purpose-built for the Profoto B1 Monolight, ensuring precise fit and consistent output
  • Lightweight at just 3.2 ounces, making it easy to carry as a spare on location
  • Genuine Profoto part maintains the color accuracy and reliability of the original tube

👎 Cons

  • Compatible only with the B1 Monolight — cannot be used in other Profoto heads
  • Premium price point typical of genuine Profoto replacement parts
  • Minimal product documentation — no rated flash count or expected lifespan provided

Frequently Asked Questions

This flashtube is designed specifically for the Profoto B1 Monolight and is not intended for other Profoto light models.
Yes, it is a replacement flashtube that can be swapped in when the original tube in your B1 Monolight reaches the end of its lifespan.
The package includes one flash tube for the Profoto B1 Monolight.
Common signs include inconsistent flash output, color temperature shifts, visible darkening of the tube glass, or complete failure to fire.

Related Products