You need 2 umbrellas, one for main and one for fill lights. You do not need to buy 3 new lights. just make sure that if you do buy a new light to get one from the same manufacturer that you have now so the metals will be the same. The difference between the light you have and the "clamp on shop lights" are the material used in the bulb base. The clamp on shop lights use plastic for the bulb base and are limited as to how much wattage of a bulb that you can use typically 100 - 150 watts. The lights you bought have a porcelain base that can handle much greater wattage of bulbs. They are better (more versatile)


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