I have a 100 watter under the hood of a loader to keep the block warm on these cold nights. All it takes to make the difference between go and no-go snow plowing
I do think their would be a market for at least 100 watt incandescents. Probably not for a large corporation. In the winter I can get 6 weeks continuous use out of a bulb. To me that would be worth paying a couple of bucks per bulb which is still available but I see that supply drying up.