DIY Pyrex Bake-A-Round cool tube
DIY for one cool tube.....You will need a MOG socket (they don't sell them at HD) but most hydro stores or electrical wholesalers do. ) They make cash sales over the counter. Good place to get bulbs too btw.
From HD you get:
2 4" vent metal collars
2 4" hose clamps
1 Roll of window foam weather seal tape (thin)
1 4” angle bracket
1 roll of metal silver foil tape
Either pop rivets or small nuts & bolts to assemble.
(x)ft of 12 gage 3 wire extension cord
That will make one unit.
If you go cheap you grow cheap. - Me