Godox is clearly aiming at the top of the cinema-lighting world, and the KNOWLED MG4KR RGB LED Monolight is one of its biggest swings yet. It’s the full-color version of the bi-color MG4K, built for crews who want HMI-level punch but also need real RGB control. With a 3250W COB engine, the MG4KR is designed to handle large sets, fight daylight, and deliver bold color looks without compromising brightness. And if you’ve been watching the KNOWLED line, this sits right below the MG6K; Godox’s even larger high-output beast, offering a more compact option that still falls into the “big-gun” class of lights.
What makes it feel “pro” isn’t just raw power. The controller is separate from the head, so rigging is safer and cooling is stronger; Godox even claims a big jump in cooling efficiency for long shooting days. Add the IP65 weather-sealed body, wide-gamut color, and precise green/magenta correction, and you’ve got a high-output RGB cinema light designed to replace many 4K HMIs while giving you modern LED flexibility. In short, the MG4KR is the sweet spot for teams who want near-MG6K muscle with full-color freedom, without dragging HMIs and gels everywhere.
Godox KNOWLED MG4KR – Features & Specs
| Feature group | Specification / Detail |
|---|---|
| Type & power | High-output RGB COB LED monolight for film/TV/studio, 3250W max |
| Brightness & beam | 225,100 lux at 3 m (5600K) with 20° reflector; bare beam 110°, reflector beam 20° |
| RGB color output | At 3 m with reflector: Red 24,600 lux, Green 40,500 lux, Blue 13,400 lux |
| Color modes | RGB, HSI, Gel mode, and CCT (white-light mode) |
| Color temperature & tint | 1800K–10,000K range, with green/magenta shift (±100%) |
| Color quality | Wide color gamut (91% Rec.2020), high accuracy (CRI ~97, TLCI ~96) |
| Dimming & effects | 0–100% dimming in 0.1% steps, 4 dimming curves; 14 built-in FX |
| Flicker performance | Smooth dimming + high-speed flicker-free mode for slow motion |
| Build & durability | IP65 dust-tight and water-resistant body |
| Mount & modifiers | Godox G-Mount (works with MG-series modifiers) |
| Control & wireless | On-light + controller control, DMX/RDM, CRMX, Ethernet, Bluetooth/app; Bluetooth up to 60 m + NFC pairing |
| Power input | 100–240V AC, 50/60Hz |
| Weight | Head: 23 kg (50.7 lb), Controller: 6.9 kg (15.2 lb) |
| Working range & updates | Works from -20°C to 45°C; USB-A for firmware + 5V power out |
1. Type & Power Class
The Godox KNOWLED MG4KR is a high-output RGB COB LED monolight made for film sets, TV studios, rental houses, and big commercial shoots. It draws up to 3250W, which puts it in the same power league as many 4K HMI replacement LEDs. In practice, this means you can use it as a real key light for wide scenes, not just as a colorful accent. It’s part of the Godox KNOWLED cinema line, so it’s built to handle professional, daily use.
2. Brightness & Beam Control
This light is all about punch and reach. With the included 20° reflector, it hits roughly 225,100 lux at 3 meters in 5600K daylight, giving you the strength to fight sunlight, push through heavy diffusion, or throw light deep into a set. Bare, it spreads wide at 110° for softer fills, but once you add reflectors or a Fresnel, it becomes a sharp, controllable beam that feels like a “sun source.” For crews who often do day exterior keys or sun-through-window looks, this output level is a big deal.
3. RGB Color Output & Wide Gamut
Many RGB lights lose brightness when you go into strong color. MG4KR is designed to stay useful even in saturation. With the reflector at 3 meters, color brightness is still strong (Red 24,600 lux / Green 40,500 lux / Blue 13,400 lux), so your reds don’t look thin and your blues don’t die out. It also covers 91% Rec.2020, giving you a wide color palette for music videos, fashion films, stage lighting, and stylized cinema. You can light a whole background in color without adding extra fixtures.
4. Color Modes, Kelvin Range & Tint Shift
The MG4KR gives you several ways to work fast: RGB for full creative control, HSI for quick hue/saturation picking, Gel mode to copy classic film gels, and CCT mode for clean white light. Its 1800K–10,000K range lets you match candlelight warmth, neutral studio tones, or bright midday daylight. The green/magenta (GM) shift ±100% is a quiet hero feature, it helps you match mixed light sources on set (like HMIs, fluorescents, or other LED brands) so your whites stay neutral and skin tones look consistent.
5. Color Accuracy for Cinema
Power is useless if color is messy. MG4KR is tuned as a cinema-grade RGB LED, with CRI around 97 and TLCI around 96. That means skin tones stay natural, whites don’t skew green or pink, and saturated colors stay clean instead of muddy. If you deliver for broadcast, streaming, or picky commercial clients, this level of color fidelity saves time in grading and makes shots feel more expensive.
6. Dimming, Curves & Built-In Effects
You get precise dimming from 0-100% in 0.1% steps, so you can fine-tune exposure or match other lights without big jumps. The four dimming curves (linear, S-curve, exponential, logarithmic) let fades feel smooth and film-like, especially for practical light moves in a scene. On top of that, you have 14 built-in FX modes like fire, TV flicker, lightning, broken bulb, and police lights, useful when you need quick atmosphere without extra rigs.
7. Flicker-Free High-Speed Performance
For slow motion and high frame rates, the MG4KR includes a high-speed flicker-free mode, plus a smooth mode for normal filming. This helps in action work, sports ads, music videos, and any shoot where you’re pushing 120fps, 240fps, or more. You don’t want to find flicker later in post; this feature makes the light dependable for high-speed cinema use.
8. Build Quality, Weather Sealing & Mount System
This fixture is made for rough real-world sets. The IP65-rated weather-sealed body protects against dust and rain, so outdoor work feels safer and faster. You don’t need to panic when weather shifts.
Up front, it uses Godox G-Mount, built for high-power COB heads. That means you can use heavy-duty modifiers like Fresnels, beam reflectors, projection attachments, and huge softboxes without stressing the mount. In other words, MG4KR isn’t just a light, it’s a full high-output cinema lighting system you can shape any way you want.
9. Cooling & Fan Noise Management
The MG4KR uses an advanced fan cooling system to handle its 3250W high-output RGB COB engine, so the light can run at full power for long takes without overheating or drifting in brightness and color. That stability matters on real sets, especially when you’re using it as a 4K HMI replacement LED in hot studios or outdoor locations. You will hear some airflow if you’re standing close, any HMI-class LED needs active cooling, but the noise is controlled for film work, and with normal placement (a few meters away, or behind diffusion/modifiers) it rarely becomes a problem for dialogue scenes.
10. Pro Control & Wireless Options
Control is fully pro-level. You can adjust from the head, from the controller, or through DMX/RDM and CRMX wireless DMX on bigger sets. Ethernet gives stable networking in studio grids, while Bluetooth app control is great for small crews working fast. Bluetooth range is about 60 meters, and NFC pairing helps you connect quickly without digging through menus. Whether you’re in a studio, on a truck-based crew, or on a lean indie set, this RGB COB film light fits the workflow.
11. Power Input, Weight & Operating Range
The MG4KR runs on standard 100–240V AC (50/60Hz), so it’s ready for global productions with the right distro planning. The head is about 23 kg and the controller about 6.9 kg, heavy, yes, but still more manageable than many traditional HMIs with separate bulky ballasts. It’s rated to work from -20°C to 45°C, so it’s reliable in cold mornings and hot locations. A USB-A port allows firmware updates (keeping the light current over time) and provides 5V power out, handy for small accessories on set.
What’s included in the KNOWLED MG4KR kit
- Godox KNOWLED MG4KR RGB LED Monolight (light head)
- U-type/yoke bracket for mounting and tilt adjustment
- 20° G-Mount reflector (MGR20) for maximum punch and throw
- Separate controller/ballast unit
- Controller mounting accessory (to attach ballast to a stand/rig)
- AC power cable
- Head-to-controller power cable (DC cable)
- Cable tie / management strap
- Safety cable for secure rigging
- Protective cover for storage/transport
- Standard warranty (varies slightly by region/retailer)
Pricing and availability of the KNOWLED MG4KR
The Godox KNOWLED MG4KR sells in the premium cinema-light bracket at roughly $6,199 USD for the single-light kit. It’s a late-2025 release and is showing up as a new arrival or preorder at major dealers, so exact delivery timing depends on your country and the dealer’s shipment schedule.
CREDIT – https://www.godox.com/product-e/KNOWLED/MG4KR.html
https://www.newsshooter.com/2025/11/21/godox-knowled-mg4kr/
https://www.bhphotovideo.com/c/product/1920275-REG/godox_knowled_mg4kr_rgb_led.html
MG4K is bi-color and more efficient for white light. MG4KR is full RGB, giving you color with high brightness, but with a bit less pure white efficiency. They share the same body style and G-Mount ecosystem.
It supports both. You get wired DMX/RDM and CRMX wireless, plus Ethernet and app control. That makes it viable for studio grids and fast location work
Yes, if you use a stable generator with headroom. Treat it like a pro cinema head: clean power, good cables, and no overloaded circuits. The 3250W draw is your planning number.
