I want to put a standard BC bayonet fitting LED light bulb in our driveway lights. I need them to be bright - the equivalent of 100 watts. According to this website I need a 16 to 20 watt LED, but I can't find them. The most powerful I can find is this Philips 12w here equivalent to 60 watts. Anyone know where I can buy 20 watt LED standard fitting bulbs?