Chihiros WRGB II Slim vs PRO: Which Planted Tank Light?
Chihiros WRGB II Slim vs WRGB II PRO aquarium lights compared on brightness, power, color channels and best plants, with who should buy which.
The short version
Buy the WRGB II PRO for a planted tank with demanding, high-light plants. Buy the WRGB II Slim if you want a gentler light for low-to-medium light plants and fish. Chihiros lists the Slim as 40 to 50% less bright than the PRO. Choose the model length to match your tank.
The WRGB II comes in two lines, Slim and PRO, in lengths for tanks from 30 cm to 120 cm. The cards below show the Slim 45 and the PRO 60, but both lines come in several sizes, so match the size to your tank width. Our WRGB II PRO review covers the PRO in detail.
At a glance
| Chihiros WRGB II Slim Edition (45 cm shown) | Chihiros WRGB II PRO (60 cm shown) | |
|---|---|---|
| Brightness | 40 to 50% less bright than the PRO | Higher brightness (6,630 lm for the PRO 60) |
| Power | 23W to 90W across sizes | 37W to 138W across sizes (74W for the PRO 60) |
| Color control | 3-in-1 RGB with adjustable color temperature | 4-in-1 WRGB with individual white, red, green and blue channels |
| Best for | Low-to-medium light plants and fish | High-light plants, carpeting and stem plants |
| App | Bluetooth My Chihiros app, sunrise and sunset modes | Bluetooth My Chihiros app, timers and per-channel control |
| Sizes | 30, 45, 60, 90 and 120 | 30, 45, 60, 80, 90 and 120 |
| Water protection | Not listed | IP43 splash-proof |
| Budget tier | Under $200 | Under $500 |
Specs from each manufacturer's published listing. Confirm the current listing before you buy.
Choose the Chihiros WRGB II Slim Edition (45 cm shown) if…
Your plants are low-to-medium light, or you keep mostly fish and want a lower-intensity light that is gentler on algae. The Slim is also the lower price tier.
Check Chihiros WRGB II Slim Edition (45 cm shown) on Amazon
Choose the Chihiros WRGB II PRO (60 cm shown) if…
You grow demanding plants, carpets or stem plants and want the highest output with individual control of the white, red, green and blue channels.
Check Chihiros WRGB II PRO (60 cm shown) on Amazon
Who should skip both
If you want a simple always-on light with no app, a basic LED is cheaper (see planted vs basic LED). If you want a Fluval option, see Fluval Plant 3.0 vs AquaSky 2.0.
Related
- Chihiros WRGB II PRO review
- Fluval Plant 3.0 review
- Best LED aquarium lights
- Planted vs basic LED light
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these products side by side. Confirm current specifications and prices before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Frequently Asked Questions
What is the difference between Chihiros WRGB II Slim and PRO?
The PRO is the brighter, higher-power line with 4-in-1 WRGB control for high-light plants. The Slim is listed as 40 to 50% less bright and is designed for low-to-medium light setups.
Which is better for a planted tank?
The PRO for demanding plants. The Slim for low-to-medium light plants.
Do they need an app?
Both use the My Chihiros Bluetooth app for timers, intensity and color control.
How do I pick the size?
Match the model length to your tank width. The Slim 45 fits tanks 45 to 60 cm wide, and the PRO 60 fits tanks 60 to 80 cm wide.
Planning or running a tank?
Use our free calculators and guides to get every number right.
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