How much? The most common question asked. On average most plants will do just fine under 2 watts per gallon however plants such as java moss and java fern will do fine in 1-1.5 watts/gallon. For a really succesful tank 3-4 watts/gallon is needed. However with this high lighting CO2 will need to be injected.

my math is C-.. ==
2x1x1 ft.
It's 2 weeks and my sakura, swordtails , neons and guppies not kamikazing. So can say is stable ph?
Sakura is cherry?

I'm waiting for boss to import the diy co2 parts..
I very bad with these stuff. But very good in buying wrong stuff ==

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Added on August 22, 2011, 7:24 pmwow~ found a cool link with calculator:
Says my tank consider nano with 54 litre ( volume)
Need 9litre ADA, 5 cm thick

Estimative Index was created By Tom Barr to be a simple method for dosing nutrients to planted tanks without the need for monitoring nutrient levels using test kits. Basically the aquarist doses the tank with a slight excess of nutrients throughout the week to prevent anything from running out and does a large water change at the end of the week to prevent anything from building up. In this way we can provide a close approximation or ‘Estimative Index’ of the nutrient levels during the week as we know what is being added and also what is removed in the water change. Estimative Index works best with high light systems and well planted tanks, but can be adapted for lower light systems by reducing the dosing.

The fertilisers are the Macro Nutrients – Nitrogen (N), Phosphorus (P), Potassium (K) and the Micro Nutrients (or trace elements) which include Tropica Plant Nutrition, TNC Aquarium Trace (Liquid), Seachem Flourish, CSM+B, TNC Trace and chelated trace mixes.

The process of dosing is fairly simple. Each day (less for lower light systems) the fertilisers are dosed according to general guidelines based on tank size. At the end of the week a 50% water change is performed to reset the nutrient load in the tank. Then the process is restarted again. The 50% water change is just a guideline and doesn’t have to be followed but doing a larger water change will have greater accuracy of nutrient levels.