Inside the apartment, it's like it doesn't exist, just like outside on the balcony, it's the same. It doesn't work at all, neither in darkness nor in light. The watermelon is rubbish!

It does nothing. I have had it for almost a year and I use it in a closed space with the lights off, in case 2-3 mosquitoes happen to come in. It doesn't kill any, nor does the lamp even attract them.