you could just go with no lid and hang the lights from the ceiling or sturdy wall hooks... then you don't have to worry about the height of the tank.
if height is important, you can always try a 35 gallon HEXAGON tank. they are tall but still have more soil surface area than say... a 29 gallon tank.
for drainage... you can drill holes in the glass but I don't know what kind of tools are needed, I just know it's possible.
or, here's another idea (if you really want to use a fishtank)...
that white plastic grating that's about a centimeter? spaced... cut some to the size of the inside of the tank with a hole cut out big enough for a syphon (go to a petstore and ask for a syphon or a "gravel vacuum", they should know what i'm talking about), keep it raised some odd inches above the bottom of the tank with... anything. pvc pipe, some rocks, whatever. cover the grating with finely-spaced screen to hold in soil (the plastic grating is for stability). keep a pvc pipe in that hole cut out (also big enough for the syphon to fit in), and make sure the pvc pipe is taller than how deep you want ur soil to be. fill in the soil ontop of the screen & grating, going around that pvc pipe. plant ur seeds and let them grow. since the tank is glass, you'll be able to see when the water level is filling up (underneath the grating and soil). when you need to, you can syphon out the water from underneath it thru that pvc pipe hole. the syphon is easy to use. keep a 5 gallon (or whatever you want) bucket around and just make sure ur tank is not on the floor. to start the syphon, keep the "mouth" of the larger part (you'll know when you see it) in the water thru the pvc pipe, and just suck on the little part for a few seconds (before it gets to your mouth obviously) then put the small tube of the syphon in the bucket. as long as the bucket is lower than the tank, you don't need to do anything else. it will syphon on it's own till there is no more water down there.
enjoy.
