Thirdly, your house is too messy. The most basic principle of Feng Shui is that the house should be clean and tidy. If the house is in a mess and there are sundries everywhere, it is useless to put more Feng Shui items, because the two stars, two black, five yellow, represent sundries, so I suggest you tidy up your house at once and make it as clean and tidy as possible, which is very beneficial to Feng Shui and yourself.
The way to solve the darkness in the corridor is to put a long-burning lamp or a string of six copper coins. There aren't many coppers. Six coppers is enough. If it is too much, it will fail.
Things that have melted are placed in the corridor.
Hope to adopt, thank you!