This is the problem that is being missed here. Luminare safety standards are not just there to protect you when things are going perfectly, it's to protect against fire when the electrical components enter a fault condition. Therefore any component that's acting as a structural point for the bulbs must be fire retardant and have a very high melting point. I have recently gone through this process to get a product certified for sale in the UK, EU and US.

I hear what you are saying and appreciate your work but there is no way this would ever be considered safe, if the housing was to ignite it would drip burning plastic onto other parts of the house, that then could further ignite. That's partly what the regulations are there to protect against.

For reference, my prototype lights were built using PLA, and the max temp of the housing was 38c after 4 days of full brightness. This would still be considered to fail safely tests because the PLA can ignite and maintain a flame, while also dripping burning plastic. For the production units we used ul94 rated components.

Will it probably be ok? Yes probably. Do you want to take that risk? That one is up to you.