When you power your system on you’ll notice the four fan light up nicely. The illumination is more than enough to light up the inside of the case.
MSI does provide a controller with this case and you can easily change the color / effect on the fans using the LED button on the top of the case. You can also plug the controller into your motherboard and control the lighting on the fans using your motherboard’s RGB software. Here are some of the different colors / effects that the fans offer from the controller.