Fill the grid with digits 1-9 so that each row, column, and box contains exactly 8 unique digits. Digits along an arrow must sum to the digit in the attached bulb. Digits along a thermometer must not decrease from the bulb end to the tip. Two cells connected by a green line must have a difference of at least 5. Clues outside the grid give the number of digits visible from the clue's position, given that each digit blocks the view of any digits behind it that aren't larger than it. Along a blue line, box borders divide the line into smaller segments with the same sum. Digits can repeat along a segment if allowed by other rules.