Historic Iona Church Restoration Trust committee member Bruce Clark was in the church for about five hours on Monday setting up the lights.
The trust decided to light up the church to celebrate Matariki this Friday.
"We wanted to show how the church can be used in different ways and also give back to the community a bit."
He said it took 30 LED lights to fully illuminate the church.
"When you walk around the church, it's actually glowing on the pathways around the church — some people are saying it looks eerie ... but it's just a blue glow on the windows."
Money raised by the cruise ship passengers who visited the church paid for the display, Mr Clark said.
The church would glow blue until Sunday and he hoped it would draw some late-night visitors to Port Chalmers.
People would be able to walk around the church grounds and take photos from outside. However, visitors would not be able to enter the church because of the amount of cabling used for the display.
Any high point around the town was also a great vantage point, he said.
The church lights run on a self-timer and would be on from 5pm to midnight. The clock, however, would stay blue day and night.
