The placement of your lights will determine the mood of the shot more than the amount of light they produce. That is, you can get what you want with strobes and fairly slow film if you put the strobes in the right places and control the background. And you can include candles in the shot and drag the shutter to show the flame or do a double exposure to capture the flame. The strobe could be placed to suggest that the shot is lighted by the candles.