Communication doesn't have to happen inside the hive, but the perception of the waggle dance by another bee seems to me to still be a mystery. The polen seeking behavior is clearly driven by day/night cycles. The best nectar is probably available in the first morning hours. I don't think that the communication is electrical. Here's an alternative.
Pheromones may play a key role in providing a destination code for the trip and an excitation mechanism for other bees. A bee that receives the pheromone becomes a potential "traveler bee." Then, maybe the pheromone in play limits the options so that a new traveler bee only needs a piece of the waggle dance to navigate. For example, direction (clockwise vs. counterclockwise) and circle vs. figure 8 might be enough. That information might be "picked up" by perceived movement (touch) in the hive-not by vision. With that information and the pheromone target, the traveler bee might have enough navigation information to find the flower and the nectar.