All I can say is I would use that cool tube to insulate it and vent the top of the box to keep it cool. Every piece of glass the lumens move through make it weaker as well. Its to bad they dont make thicker glass bulbs. We could save atleast 10% on electric. Then you got photon return which is complicated but can cancel out lumens when light is reflected back like those side by side bulb shades.
one love
c