GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Light cans in lid

american green | Posted in General Questions on

Sorry this got posted first as an answer!
In the case of a retro and the cans were not direct contact what would you think about making a chicken wire basket/dome around the can and mounding the insulation around it? Other burning question is I would think since compact floresent bulbs don’t get as hot as incandesent the problem of close can contact with insulation may not be a problem at all, what do you think?

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. boatkinson | | #1

    For heat reduction, LED lights far surpass fluorescent bulbs and save considerable energy too-- Brighter LEDs are slow in coming to market, due to vested market forces. As i remember it took compact fluorescent bulbs about 20 years to commercialize brighter and warmer-tone bulbs at low cost. As to cementitious embedding of light-cans... I would be sure to check with your code people first and solve this before hand-- Once a bulb emits heat, it needs a provided escape route. So some sort of heat dissipator towards the room-space should be allowed. Overly insulated light bulbs are likely to overheat beyond approved specs. That is perhaps why inefficient products will disrupt the good intentions of going green. Cement-- In common-sense terms only, i can say that i have found ordinary portland cement or masonry cement can easily be mixed with vermiculite. High temperature insulating can thus be obtained easily, with ordinary materials. Yet a refractory mineral wool is much easier to work with, provide one does not cook those less efficient bulbs. Bo Atkinson

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |