Normal sudoku rules apply. Divide the grid into two orthogonally connected regions; one green and one orange. No 2x2 area may be fully within one region. In the green region, the value of a cell equals its digit, as normal. In the orange region, the value of a cell equals its row number plus its column number, regardless of what digit appears in the cell. Values along a thermo strictly increase from bulb to tip. If a black dot sits between two cells, the value of one is double the value of the other.