This commercial use pack is released under a no-attribution, no reselling license. This means:

You
can use, modify, and share these assets as much as you'd like in any
project that you charge money for or use commercially - and you don't
have to mention where you got them. (But I'd appreciate it!) You can
alter and modify these assets however you'd like, but you can't resell
those base or modified assets.

For
example: You draw some lava on these lights. Now they're lava lights. You
can use those commercially as much as you want within your maps or
projects - but you can't resell your modifications as individual or packaged assets themselves.