He said the design was selling well at retail and had also made some initial sales in Australia. Commercial orders were also growing.
"I knew nothing about how to price the product or how the retail world worked, or how to market when I started," he said.
Mr Macmillan recently gained through the Tauranga Chamber of Commerce a business mentor, which he said had been a massive help.
The Clever Design Store director Paul Kayser, who attended the awards, said Mr Macmillan had come to him at an early stage with several iterations of his designs.
"I was immediately drawn to the simplicity of his original idea - thin strips of ply in a tube-like form," he said.
Mr Kayser said the sustainability aspects of using ply off-cuts also appealed to him, and after a short period the lights began to sell, striking a chord with The Clever Design Store followers.
"It's the story behind the work that fascinates and separates considered design that's well crafted, from the mass-produced and poorly made products that surround us," he said.