What does the lantern mean in the bottom right sometimes if you're obsession?

[David]

As title.

[Kiwi Bug]

Maybe the one that increases the obsessions healing? Not completey sure though.

[EnderW]

It means the obession perk the killer is using is dying light

he gives you a buff while you're alive and debuffs the whole team when you die

You become obsessed with one survivor. Your obsession's altruistic action speed is increased by { 38 / 44 / 50 }%. Once the obsession is killed or sacrificed, every other survivor gets a penalty of { 19 / 22 / 25 }% to repair, healing and sabotage speed. Only one obsession per match.

[Chrome Dome]

It means the killer has the Dying Light perk.

As long as you are alive you have a increase in altruistic actions like healing.

If you die everyone has a decrease in how fast they can repair sabotage or heal.