Philips Canlyte says about 190 workers will be losing their jobs as they prepare to cease production in Cornwall.
Their plant - open for 27 years - will be phasing out its production of flourescent lighting fixtures and will be transferring its LED fixture line elsewhere in North America.
The company blames a change in market demand as more industries and businesses are moving to the longer-lasting LED fixtures.
A company spokesperson says employees are receiving details of their termination agreements.
The Canadian Press