We here on the AllTheMods discord have a few feature requests for your fantastic mod.

1. Elemental sources should emit light. (light level 7 or below? Think silent gems glow roses)
   1b. Elemental Sources should render farther away.

Please consider our request and thank you for your time. Happy Modding, and happy holidays.

I'm a bit late but whatever. You can find element sources easily by looking on the map. If you look closely there are some black dots, that represent nodes.

This will be part of 2.6, there is already a snapshot on curseforge.