Your lamp
$TICKER
SHADE UNKNOWN · #? · the pool decides
dark60s to glow
on the sill · opens at the near end of its range
the wick
One transaction, gas and nothing else. You name it; the range, the split, the dark minute and the dust are the same for every lamp.
while it is dark
$TICKER
SHADE UNKNOWN · #? · the pool decides
on the sill · opens at the near end of its range
the same for every lamp
The pool opens at the sill, the cheap end of a fixed range. Buying climbs it toward the bulb; selling brings it back down. The two ends are constants in the verified contracts, and the hook refuses any trade that would leave the range.