2x36W PL - enough for 2ft tank?

[acidjc]

hi all,
does 2x36W PL enough for a 2ft planted tank??? [:]

[hwchoy]

72W for 21gal can lah... just make sure the tubes are staggered to cover the length of the whole 2 feet, otherwise you get romantic corners for fish whooppee

[juggler]

More than enough. 72W PL is hot. Make sure tank is well ventilated.

[ZeRoC00l]

what abt lightings for 3 feet tank?

I'm using 6 X 20W now... thinking of upgrading to 3-4 X 36W PL

Cheaper in the long run???

Any suggestions?

Thank you

[Simon]

zercool, wat u mean by cheaper in the long run? when it comes to lights, u have to see what u need.. prolly, u can add more to yr tank, but u oso have to consider yr plants..

[ZeRoC00l]

Cheaper as in less replacement of bulbs, and the ballast.

I have to change my FL bulbs every 6 mths.. and kinda taxing on my pocket as a student.

I'm wondering if changing to PL, woukd help lighten the load, as I heard tt I only need to change them once they get blown ??

Thanks