I plan on getting mine from C Crane Co. They hold the patens on led light bulbs. So far they have gotten up to a 70 watt output with less than 3 watt input.
The other ones has a CFL inside & claim to be very safe. That is a lot of cr@p. I can feel a thunderstorm at 200 miles,and the closer it gets the worse I feel!
I've been to their facility in Northern California. I have a Select-a-Tenna that I bought last time I was there, many years ago. Great company!