4 x 55w PL enough for 100 x 30 cm tank?

[naresh666]

4 ft light set with 4 x 55w enough to power my tank?

i plan to grow HC and hairgrass.

[juggler]

4ft light set with 220W over a 3ft tank? Looks awkard?

I think it is more than enough. Should cut back on lighting.

[naresh666]

the reason is i do not know how else to fit in optimum lights for this tank.

if any one can advise i will be at peace.

[naresh666]

can explain why i should be cutting back?

as i read HC tank. need at least 3 watts per gal.

[naresh666]

argh!

haha i am .

i misread 120l as gallons . no wonder i was having a hard time finding suitable lights.

mine is 31.7 US or 26.4 UK. so which should i use for reference.? ard 3 to 4 wats per gallon rite?

benfit of the doubt i take US.

ard 120 watts is optimum i suppose.

[juggler]

Well... good if you have not bought the lights.

Use the US Gallons for calculation. 3~4 W/g should be OK. Get fans to cool the tank too.

[naresh666]

yeah i have not ! haha

[tcampbell]

A standard 3 foot tank is more than 31.7 Gallons, more close to 50 gallons for a tank that is 3 feet by 1.5 feet by 1.5 feet, right?
That's mime. so at 3 watts per gallon you would need around 150 watts of light. I have 6 tubes of 30 watts each with a total of 180 watts byt I typically use only 4 or 5 tubes (120 ~ 150 watts)

[naresh666]

mine is slightly narrow. i used the calculator. its 100 cm x 30 cm x 45 cm/

i am going to diy a 2 x 55w pl into my current 3 ft light set up which currently housed 2 x 36 w.

i think 110 w is enough!

any comments on this?

[mordrake]

should be enough.
just remember to keep up the ferts and co2 with that level of lights.