Any particular basis you're working from with the 100w requirement? Is it simply brightness? The color lamps very greatly in color quality and brightness, even for two bulbs of the same wattage from two different manufacturers. I switched over to LEDs last year from floodlights and was very pleased with the result. Dimmer, but much better color so the net result was much better. They also offer low power consumption (less than one watt) and no heat.