Basic electricity consumption questions

I have a little understanding I believe of how to calculate the electricity consumption of CFL's/LED's and would like to run my understanding by you guys.

Hypothetical setup:

1 x 200w CFL - 6400k
1 x 130w CFL - 6400k
1 x 14w 220 LED

CFLs much like this one - http://www.ebay.com/itm/200W-CFL-Fl...492?pt=LH_DefaultDomain_0&hash=item5d3fe3700c

LEDs much like this one - http://www.ebay.com/itm/Quad-band-2...lant-Lamp-Blue-Red-Orange-White-/390407500133

I can't find any information on the amperage of the lights but a friend tells me that the cost of running them is dependent on the amperage not the watts as CFL wattage is different. This I do not agree with.

My understanding is that CFL's can be advertised as "25w equivalent to 100w!! Save on energy costs!" but that this does not apply to the common grow CFL's and that the wattage as listed is directly how to calculate cost.

From what I've read power usage is counted in watts which is amps times volts.

Total light wattage as listed above - 344 watts
Running time - 12 hours
Kw/H cost - $0.22

Cost per day - 0.344 * 12 * 0.22 = $0.91

Just noting then when in 12/12 (flowering) a 2700k light should be used instead of a 6500k right? How great of an impact would incorrect bulbs make?

Are CFL's only cheaper because they generate less heat and thus more efficient though with greater than 250W of CFL light a HPS generates more lumens and then is more efficient by comparison? Sorry that is worded poorly.

I know these topics have been covered but I'm finding it hard to find definitive non subjective answers and wanted my theory checked by those who understand more.

Thanks

Hi,

I found this post on another forum which I hope will help:

http://cr4.globalspec.com/comment/345875/Re-Do-You-Pay-for-Watts-or-Volt-Amps

It confirms your suspicions are correct - domestic properties are charged consumption rates by the kilowatt hour.

Peace

EDIT:

Using the correct bulb spectrum is beneficial to the plant, as certain chlorophyll react better to specific spectrums. You can flower under 6400K and veg under 2700k, but it isn't advisable. The plant makes better use of 6400K during veg, and 2700k during flower.

HPS produce more lumens per watt, and have better penetration (usable light from HPS travels farther than light emitted from CFL) but have a higher heat output. People with small spaces lean towards CFL for the lower heat output (allowing growers to grow in tight spaces), and because the initial outlay is lower (you can add bulbs throughout the grow as your budget allows).

Your friend is right too. As the current increases the power consumption increases according to ohm's law. A higher wattage bulb will draw more current (amperage).

If your going to grow with CFL's your going to spend less than with HPS. What are you going to grow, what size cabinet, what strain. All these points have to be addressed for a good outcome and yield.