I have a bunch of LL nep seedlings and needed a place that was closer to LL conditions to grow them out for the winter.
I had a spare 4ft long 55g tank and decided to set it up.
There is a 4ft t8 shoplight with 1 daylight 6500k and 1 sunshine 5000k bulb for lighting.
water in the bottom for humidity and heating with a submersible fish tank heater for warmth.
For air circulation I have my old laptops fan in there wired to a cell phone charger.
For the rear reflector I used a emergency blanket glued to a cardboard box with elmers craft bond.
Not shown in the pics are bubble wrap around the tank and another emergency blanket put over the top to help keep temps stable.
click for hi res pic.