you will definitely need to power the LEDs using some other source than the Photon.
If you are clever enough you can could lite each country on the globe using one string of LEDs, bearing in mind that you may wish to waste one or two inside the globe in the case of long stretches.
You can even fade one or several, like on the word clock I did which I borrowed from @wgbartley's project. That was created using a single string of WS2811's.
Good luck with the project, is this some kind of Olympic medal globe?