If you aren't going to get any training in its use, it will draw fire, but IMO flashlights are a must. You should not be shooting without identifying your target and since most home invasions happen at night (and since 2+2=4) you should have a flashlight.
But I cannot stress enough that you need to get low-light/no-light training. When you use a flashlight properly, it gives you a serious advantage over an intruder and will only give them an aiming point for a fleeting second before you have moved. By that time, they are shooting at where you were, and you are in a position to put the light on them and put more accurate shots on target and end the threat.