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If you’re thinking of buying an extra light, I hope it’s a hair light, because if you think you need a second strobe just to fill in shadows, you really don’t need one. That’s because for around $36 you can pick up a silver 30″ reflector, which will act as your second light by bouncing light from your first light back toward your subject to fill in any dark shadow areas. If you use the silver side of your reflector, it will throw a tremendous amount of light back at your subject (the white side reflects or bounces much less light than silver, and works best just to add a little sparkle and fill in close-up portraits). If you want a serious second-light alternative, go with a round silver reflector.