Two green cells that see each other in a row or column must sum to a digit between them.
If there are more than two green cells in a row or column, the first only sees the second, and the second only sees the first and the third.
A valid example can be seen to the right.
Digits increase on thermometers from the bulb end.
Normal Sudoku rules apply.
Try it at F-Puzzles.
For an introduction to the rule set, you can watch this solve of a similar puzzle from Cracking the Cryptic.
Solution code: Digits from last row. No spaces or commas.