People flocked to the night carnival at the Wan Chai harbourfront on Wednesday, the first to open under the government's Night Vibes initiative to boost the city’s after-dark economy.

Both residents and visitors said they enjoyed the atmosphere at the carnival, which featured food stalls as well as live music.

"I just come here and walk around. I like the scenery and frankly the setting. There are some nice shops, so you can have a drink and can eat something, so the whole thing is nice," said Stefan, one of the attendees.

"I think it's amazing. It's really beautiful. It's a good way to promote Hong Kong culture... I have never been to such a nice carnival. There is really good food, really good music. It's really cool," said Roman, a Hong Kong resident.

But some vendors complained about the electricity supply at the carnival. One of them, Ms Chan, said her products had spoiled as her fridge could not use the electricity at the venue.

"We are facing a huge problem. Without electricity, we are in great trouble. All of our products are frozen food. There is basic electricity supply, but our cooker and fridge [use a different voltage]. Without electricity, we can't keep our products frozen, so we lost a lot of food this time," said Chan.

In response, Hongkong Electric said the power supply to the carnival in Wan Chai has been stable, adding that it had deployed engineers to the venue.

The electricity supplier said it would discuss with the Electrical and Mechanical Services Department and the Development Bureau about how to provide further support to the carnival.