I think that the coloured incandescent lamps we had here, were 40W. This lamp is also ideal for night light because its orange light that is good to the brain during sleeping and the low amount of light of 15W incandescent lamp in general.
I don't know why current coloured LED filament lamps are only available in 7W, which in white is as bright as 75W incandescent.

Here the main wattages for GLS incandescents were 15, 25, 40, 60 & 100 watts. Only 15 & 25 watts suitable for outdoor use. I actually have a pink 150 watt & a red 200 watt (although this could have been third party painted)

I remember seeing 25W coloured incandescent lamps at the electrician house of Givat Hayim Icud.