The Func MS-3 features three lighting zones, two of which are customisable through the software suite: the Mouse Wheel, InstantAim Button and DPI Step Indicator. It's much more of an accent lighting effect than the almost garish designs of other mice, and complements the matte black finish of the MS-3 very nicely.

Colour options for the LEDs are surprisingly extensive, some of the most extensive we have seen on any mouse in fact. The Mouse Wheel and Instant Aim button LEDs are independently assignable to different colours, with Brightness and Saturation - the latter determining how pale a colour is - also being adjustable and having an easily discernible effect. Each lighting zone can also be set to a pulse effect, swiftly brightening and dimming in tern.

This level of control complements the lighting's accent nature. In mice with much more extensive illumination it would almost certainly become far too difficult to create a consistent effect due to the difficulty of calibrating LEDs in an array to have identical characteristics, whereas the small lightbar-esq effects work very well and are relatively easy to get even.

There is a third lighting zone - the DPI indicator. In fact these are three LEDs which indicate the current DPI pre-set level (which can be adjusted in software to be between 90 and 5400 DPI). When the Profile cycle switch is pressed (default to button 8 above the right-mouse-button) these LEDs turn white, after which further presses cycle through the three available profiles, the number of illuminated LEDs indicated the currently selected profile. No input after 2 secs turns off this profile cycle mode.

We find the lighting to be subtle, but effective. Thanks to Func's design both profile and DPI level identification can be performed at a glance, whilst the amount of lighting won't cause any distraction during use. As customisation goes it's not as extensive as the efforts of many other manufacturers, but does have functional value and charm of its own.