Chihiros LED Aquarium Lights: Complete Guide to the Full Range

Introduction

Chihiros offers a wide range of LED aquarium lights designed for different tank sizes and plant-keeping goals. With options ranging from simple nano setups to high-tech planted tanks, the lineup can feel overwhelming at first glance. This guide breaks down each light series, explains their key differences, and helps you choose the right one for your aquarium.

Nano Lights: C Series and C2 Range

The Chihiros C Series represents the entry-level option for small aquariums. Available in four sizes (C201, C251, C301, and C361), the numbers indicate the light length in centimeters, making it easy to match your tank dimensions.

The C Series features white LEDs only, with no color adjustment capability. Control is simple: a small button dimmer on the power cable lets you adjust brightness. These lights work well for basic nano setups with shrimp, Betta fish, or easy plants like epiphytes. They are not suitable for demanding plants like carpeting species or plants that require deep red coloration.

The C2 and C2 RGB are visually identical but offer different capabilities. Both connect to your phone via Bluetooth, allowing automation of on and off times plus dimming control. The regular C2 has white LEDs only, while the C2 RGB adds full RGB color control with separately adjustable red, green, and blue channels.

Choose the C2 if you want a straightforward light with automation and dimming. Choose the C2 RGB if you enjoy fine-tuning colors to enhance plant reds or fish appearance, or if you want more creative control over your tank’s aesthetic.

Mid-Range Lights: A2 and WRGB Slim Series

The A2, A2 Max, and WRGB Slim are designed for larger tanks and represent a step up in power and capability. All three are available in sizes from 30 to 120 centimeters.

The A2 features white LEDs only and is the least powerful of the three. It suits simple planted tanks with epiphytes and can support some carpeting and stem plants on shallow tanks. The A2 Max is also white-LED-only but delivers significantly more power, making it suitable for fully planted aquariums with any plant type, though you cannot adjust colors.

The WRGB Slim is RGB-capable despite its name (which stands for white-red-green-blue, though the Slim uses simple RGB). It is more powerful than the A2 but less powerful than the A2 Max. Its advantage is color control: all LEDs are 3-in-1 RGB units with adjustable channels, allowing you to dial in your preferred color scheme.

The A2 comes with fixed legs that screw onto the sides, so a 30-centimeter light cannot be adjusted. The A2 Max and WRGB Slim feature adjustable legs, allowing a 45-centimeter light to span from 45 to 60 centimeters. For best coverage, always match your light size to your tank length. Green Aqua offers an adjustable adapter for the A2 separately, and hanging kits are available for all models in this range.

High-Power Lights: WRGB 2 and WRGB 2 Pro

The WRGB 2 series includes three models: WRGB 2 Slim, WRGB 2 (regular), and WRGB 2 Pro. The regular WRGB 2 is nearly twice as powerful as the Slim version and is considered the best choice for most aquascapers. It delivers enough power for any plant type, any color intensity, and any tank height up to standard aquarium dimensions (30 to 50 centimeters).

The WRGB 2 Pro is even more powerful and is designed for tall or deep aquariums. If your tank exceeds 50 centimeters in height, the Pro ensures sufficient light reaches carpeting plants at the bottom. Carpeting plants demand high light intensity and sit furthest from the light source, with significant water depth between them and the lamp. The Pro’s extra power compensates for this challenge.

All WRGB 2 lights come with adjustable legs or hanging kit options. Hanging your light is recommended whenever possible: it simplifies tank maintenance, eliminates the need to move the light during cleaning, and allows you to adjust height for better access or light distribution.

Specialty Lights: RGB Vivid Mini and RGB Vivid 2

The RGB Vivid Mini and RGB Vivid 2 are distinguished by their wider lighting surface compared to standard WRGB lights. This broader coverage area is crucial for even illumination across the tank’s depth, preventing dark zones at the edges.

The RGB Vivid Mini has similar power output to the regular WRGB 2 but offers superior depth coverage. It comes in two versions: a standard model with a leg mount on the back (cable runs through the leg for a clean appearance) and a hanging version with cable exit at the hanging points. Both versions are identical in light output and spectrum.

The RGB Vivid 2 is the largest and most powerful light in the range. It is designed for hanging only and excels on large tanks, particularly 120-centimeter aquariums where a standard light mounted on top would be uncomfortable and insufficient for deep tanks. The Vivid 2’s extra width ensures even lighting across the full depth, making it ideal for high-tech aquascapes with demanding plant layouts.

App Control and Automation

All Chihiros lights with Bluetooth capability (everything except the C Series) connect via the Chihiros app. For remote control from anywhere in the world, a Wi-Fi hub is available that converts the Bluetooth signal to Wi-Fi.

White-LED lights allow you to adjust brightness as a percentage and set automation schedules. You can program turn-on and turn-off times, set a specific brightness level, and configure ramp-up and ramp-down periods (typically 30 minutes). Gradual ramps prevent fish from being startled by sudden light changes, reducing stress and jump-out risk.

RGB lights offer all of the above plus separate control of red, green, and blue channels. The app includes five to six color presets. Rather than copying specific setups from other tanks, the best approach is to browse the presets, select the one you prefer, and make small adjustments (5% or less per channel) to fine-tune the color to your preference and plant response.

Conclusion

Choosing the right Chihiros light depends on your tank size, plant goals, and desired level of control. Start with your tank dimensions and plant ambitions, then match the appropriate series. Nano tanks with easy plants suit the C Series or C2. Mid-sized planted tanks benefit from the A2 or WRGB Slim. Standard aquariums with demanding plants thrive under the WRGB 2. Tall tanks and large aquascapes need the WRGB 2 Pro or RGB Vivid 2. With this breakdown, you can confidently select a light that will support your aquatic vision.