Chihiros · Bar / clip-on
A II Max
- Made for tanks
- 30–140 cm tanks
- Power
- 32–96 W
Medium-light planted tanks from nano to large that want a simple, bright, app-controlled bar at a fair price.
6 models
Boyu · Bar / clip-on
Boyu CB Ultrathin LED
A basic, very thin white LED bar with extendable brackets that rest on the tank rim. Five lengths from 50 to 140 cm.
Updated
26–55 W5 models
Will it suit my tank?
cm long
Best for
Low-tech planted and community tanks where you just need decent white light.
Worth knowing
No dimming, timer or published PAR, and wattage per length drops off on the longest bars.
What stands out
- Ultra-slim aluminium body
- Extendable rim brackets
- 26 to 55 W
- External 12 V adaptor
Models and specs
| Model | Made for tanks | Length | Power |
|---|---|---|---|
| CB-50 | 50 cm | 50 cm | 26 W |
| CB-60 | 60 cm | 60 cm | 32 W |
| CB-90 | 90 cm | 90 cm | 45 W |
| CB-120 | – | 110 cm | 50 W |
| CB-150 | – | 140 cm | 55 W |
- Brand
- Boyu
- Voltage
- DC 12 V
Figures from the maker's published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Compare with
Browse all lights
Chihiros · Bar / clip-on
B Series
- Made for tanks
- 20–120 cm tanks
- Power
- 12.7–51.3 W
Low to medium demand planted tanks and beginners who want app scheduling without spending much.
7 models
Chihiros · Bar / clip-on
WRGB II Pro
- Made for tanks
- 30–120 cm tanks
- Power
- 37–138 W
High-tech planted tanks and deeper aquariums where you want lots of output and control over colour.
6 models
Chihiros · Bar / clip-on
WRGB II Slim
- Made for tanks
- 30–120 cm tanks
- Power
- 23–90 W
Everyday planted tanks where you want RGB colour tuning and a very low-profile fixture.
5 models
Frequently asked questions
Quick answers about the Boyu CB Ultrathin LED, drawn from its specs.
What size tank does the Boyu CB Ultrathin LED fit?
It comes in 3 sizes: CB-50 for 50 cm tanks, CB-60 for 60 cm tanks, CB-90 for 90 cm tanks. Choose the one that matches your tank length.
How much power does the Boyu CB Ultrathin LED use?
From about 26 W on the smallest model to 55 W on the largest, at full output. Most planted tanks run lights below full power.
Who is the Boyu CB Ultrathin LED best for?
Low-tech planted and community tanks where you just need decent white light.
Is there anything to watch out for with the Boyu CB Ultrathin LED?
No dimming, timer or published PAR, and wattage per length drops off on the longest bars.
What are the alternatives to the Boyu CB Ultrathin LED?
Other lights worth comparing: Chihiros A II Max, Chihiros B Series, Chihiros WRGB II Pro. Add any of them to the compare table to see the specs side by side.