Try the LED lights form Amazon. I have a 126 LED light which I find very good, it has colour gels which give warmth to a rather white/blue light.
The HC-V700 is actually quite good in low light but it may need a boost from an edit program. I filmed a Halloween train trip at night with only the carriage lights to help, it boosted very well using VideoStudio Pro X5. The result was a bit grainy but usable.
The V700 does have an accessory shoe, it is fitted into a slot above the battery.
I would not light from the camera out of choice but put the light about 3ft to one side. This will give contrast and defining shadow. Direct lighting can kill definition.