Problem is they reference everything but omens as a light in there. Start a floor get told to follow the light and tells you your objective same with secondary. Complete secondary a faint light twinkles. Complete a primary a spectral light flares up. Touching a warp asks you if you want to go into the light (or little light on floor 2) on every floor even ones that can't get chests. Except the last floor which asks you if you want to escape and you can still get a chest after that so idk

Then there is how the game works in terms of omens are what makes your warp be a good one. No matter how you try to take this it requires stretching something a bit... well except secondary objectives that's a huge stretch.

My take is. If it really is chest then what they really meant to say was omens instead of lights. If they really meant lights you are just getting double credit for primary and forgot you can get free floors as the rest are defeating monsters even if they are specific about them.

If it's the first holy heck translation error but yay I guess we will get greater insight into which omens are what proc chest floor and can start using that info on completing runs. If second yay even more cards I guess