Wow, the difference is astounding. I got the aluminum shop light from Walmart for $9.98 thats under $10. It is an overhang (they come in silver or white) that takes 2 bulbs, 32 watts each. The bulbs are 4 feet long and were under $10 too. So overall light is still under $20. I sectioned my 6 foot tank so that's why the light is off set a bit.