i need to replace my spa light. The only info i have is that is a american products. The labe is half worn off and the only numbers i can read are 7810xx. It is 100watts and the bulb says it is 120v. I dont see a transformer so i am guessing it is not 12v. What can i replace it with? what about led? do i need to do anything special to upgrade it or should i just stay with incandescent. thanks for you help!