Villagers in Ullesthorpe and Bitteswell say the orange glow from the vast industrial estate has been snuffing out the stars as the complex expands.
Now complaints about glaring lights from a new warehouse have prompted an investigation by Harborough District Council.
The council received numerous complaints about the 10-metre-high security lights surrounding the 24-hour TNT building which were shining beyond the perimeter fence and dazzling passing drivers.
Officers asked Magna Park developers Gazeley Properties to sort out the problem after visiting the site to carry out night-time observations.
But although the developers say they have now re-angled the lights to reduce the glare onto the road, residents say it has made no difference to the general problem of light pollution.
Former Transco gas company executive Alex Scott, who lives in West End, Bitteswell, said: "There were a lot of complaints when the building first went up and it has been getting steadily worse. I've not noticed any improvement (since the lights were re-angled]."
Mr Scott wryly referred to Magna Park as 'the land of the rising sodium lamp' and added: "You literally can't see the night sky anymore, it is so bad.
"When they first gave planning permission for Magna Park, it was meant to be for down-lighting."
Mr Scott said he has only ever seen such intense lights on motorways and could not understand why the warehouse would need them when loading bays were lit and vehicles could find their own way around.
Ullesthorpe Parish Council chairman Lesley Chamberlain said her daughter struggles to sleep with the 'day break' orange glow from Magna Park shining into her bedroom and she can't understand why lights are blazing in empty car parks.
Mrs Chamberlain, of Ashby Road, Ullesthorpe, was worried about the environmental impact of using so much electricity and said Sky News – who recently filmed a feature about climate change in Lutterworth – should have advised Gazeley Properties on cutting energy use.
District and county councillor Rosita Page said: "It (Magna Park] is like a Christmas tree lighting up the sky.
"I have had complaints because the lights from TNT were shining onto Mere Lane. They were complaints from drivers saying they were blinded by them."
District council enforcement officer Dean Biddle said the planning and environmental health department would soon be visiting the TNT site to decide if changes were adequate.
A council spokesman said officers could require further changes to be made if light was still spilling beyond the perimeter but had no authority to enforce changes to the general lighting on the site.
She said: "Environmental health officers are unable to take further action as under the Environment Protection Act 1990, as amended in the Clean Neighbourhoods Act 2004, lighting is not a statutory nuisance."
A spokesman from Leicestershire County Council said they have been aware of light pollution issues at Magna Park for some time and hope the management company and the businesses on site would work to reduce the problem.
TNT general warehouse manager Ian Lydell would not comment.