1970’s Astrology sign light bulbs. These have a Gemini filament that lights up. Similar to the old Aerolux bulbs. The lit up photo is from when I tested these some years ago and put them back in the box and then forgot about them. Unfortunately I dont have a standard size lamp to test them again just to make sure but I don't think it would matter since they haven't been used. I do recall, they took a little while to fully light up. Like 5 minutes or so.