They look like old fashioned C7 incandescent bulbs to me.
I bought these (eta: multicolored set) in December 2023 and used them in 5 light Christmas candoliers that I put in the windows. People complain about theirs, but honestly, I think these look as bright and colorful as the old incandescent bulbs. They do not get anywhere near as hot. Every bulb in the set works properly, no duds. The only negatives I observed are that 1) the orange and red are kind of too close in color and almost redundant, and 2) I have HUGE tall Victorian windows and these five colors in a 5 light candolier didn't throw much light upward, so my windows and rooms looked "dark" compared to when I had 3 light candoliers with all white / ivory bulbs. My solution will be remove either the red or orange and replace it with a white bulb in each candolier this year. I would definitely recommend these bulbs to anyone who wants to replace incandescents with new bulbs that burn cooler and use less electric. Too bad my local stores don't sell them. Read more
