There are so many begonias that will survive under a 60 watt bulb but do you want it to survive or flourish? First thing you should do is decide on size and color and then decide on which one(s) to buy. An easy one with great color is 'River Nile'. Rexes seem a little pickier but all have great color and if the humidity is just right, will put on quite a show. Indoor growing of canes is a bit more limited due to their size. Choose a smaller boned one such as 'My Special Angel'.