Blackpool Illuminations 

An annual lights festival in a coastal town in England, the whole promenade is covered in lights.

When a lot of (often unnecessary) lights are on in a house/building someone might liken it to Blackpool illuminations.

"This house is like bloody Blackpool illuminations! Why are all the lights on?!"

Blackpool Illuminations by addisonand5sos August 15, 2016

Like Blackpool illuminations 

When you leave lots of lights switched on in your house and your Mum says its like blackpool illuminations. Particuarly those who come from the north of england will understand

Switch the lights off it's like blackpool illuminations in here!

Like Blackpool illuminations by FerrettBalloons October 5, 2016