Twinstar B-line 20B III

Twinstar B-line 20B III – WRGB lighting for aquariums from 20–25 cm

Looking for lighting that truly brings your aquarium to life without paying a premium price? The Twinstar Light 20B III (Version 3) is the latest evolution of the popular B-Line series. Since Twinstar introduced the first WRGB technology in 2016, they haven’t stood still. This 2025 edition has been completely redesigned to deliver even higher light output and a perfectly balanced color spectrum.

Why the B-Line Version 3 is a smart choice

The 20B III is specifically designed for smaller aquariums (20 to 25 cm) where both fish and plants take center stage. While many entry-level lights produce a “flat” white light, Twinstar uses advanced WRGB technology. This enhances red, green, and blue tones in your plants and fish, while keeping the light natural and pleasant to the eye.

Key upgrades at a glance

• Improved brightness: Higher intensity than its predecessor, resulting in more efficient photosynthesis and healthier plant growth.
• Premium finish: Despite its competitive price, the BIII features a luxurious aluminum housing. This not only looks sleek above your aquarium but also ensures optimal heat dissipation, significantly extending the lifespan of the LEDs.
• Smart sunrise function: No more sudden light shocks for your fish. The lamp comes standard with a 10-minute sunrise and sunset simulation.

Control it your way

The Twinstar 20B III offers two ways to manage your lighting schedule:

1. Direct control: Using the physical buttons on the cable, you can choose from 7 brightness levels and easily set the timer to 6, 8, or 10 hours. Both sunrise and sunset are simulated over a fixed 10-minute period (not adjustable).
2. App control (optional): Want full control? By connecting the separately available Bluetooth controller, you can use the Twinstar app to adjust brightness in 100 steps and set sunrise and sunset durations of up to 60 minutes.

Watch this video about direct control. This controller is included as standard with this model.

Technical Specifications:

• Suitable for: Aquariums 20 to 25 cm wide
• Light type: Full spectrum WRGB
• Control: Includes inline controller (app control optional)
• Housing: High-quality aluminum
• Dimensions W x D x H: 180 x 55 x 130 mm
• Power consumption: 10 watts
• Brightness: 750 lm

Our tips for the Twinstar 20B III:

• Start gently with a new aquascape: Just set up a new aquarium? Use the manual control to run the light at 50% or 60% power during the first few weeks. Thanks to the high intensity of the BIII, this gives your plants time to establish roots while preventing algae from taking over.
• Pair with a BLAU or Dennerle aquarium: This light is a perfect match for a BLAU Nano Cubic Panorama 19L or a Dennerle Nano Cube 20-liter aquarium.