I want to replace the bulbs in my ceiling fan with brighter (hopefully LED) bulbs. I can't find anything that says what type of bulb this is though. The fixture has the numbers E307732 and 48A8 WG-17 printed on it. The only thing printed on the bulb is "SEC115-125V40W China". The bulb diameter seems to be about 1 3/8", and the base diameter is around 9/16" to 5/8" (I'm having a hard time measuring the base).