Ian heard this and quickly advised: "Since you suspect that removing the light tubes would increase the water speed, why still do it?"
Ian couldn't understand, is this courting death?
"Ian, shut up!"
Raphael reminded.
"Turning off the lights is related to water flow changes, which indicates that turning off the lights might be one of the conditions for 'opening the door'!"
Kreiser explained: "Because under normal circumstances, no one would turn off the lights."
"With all lights off, complete darkness would increase the difficulty of 'escaping', in an unfamiliar environment, encountering such a situation is almost certain death."
"Then when survivors find out that turning off the lights increases the water flow, they definitely won't turn off the lights again, and will even try to keep the energy-saving lamps on all the time!"
"If keeping the energy-saving lamps on means the door can never be opened, then what we did in the previous step means certain death!"
