We do design our retrofit lights to be compatible with the vast majority of recessed cans. Unfortunately they do not fit into all the housings available on the market.
If the inside of your cans do not have small holes to accept the spring clips included with your product it unfortunately won’t fit.

However, there are ways of getting around the situation if you choose to not return your lights for a refund.
You may call customer service at 1-877-333-0098 EXT. 274 to discuss further alternative options of mounting your lights.

Hope this answers your question,

Thank you,

Luminus Customer Service Team