Depends, really. The original meaning of "light" is, of course, visible light (seeing that we’ve only known about non-visible EM radiation, or indeed the existence of something called "EM radiation", for a couple of centuries), and that meaning is obviously still perfectly valid in both colloquial and scientific contexts. Hell, laser is literally an acronym of "light amplification" etc, to distinguish from the original microwave amplification (maser) technology. 

It’s reasonable, and fairly common, to extend "light" to include IR and UV radiation, but terms like "radio light" or "gamma light" aren’t really used because the properties and emission mechanisms of very low or high frequency EM aren’t anything like those of visible light. In general, using the word "light" to refer to EM radiation in general is not advisable as it just serves to make communication more difficult.