Advise@!!

cooker06 · #1 04-14-2008, 12:28 AM

how energy effecient is a 250 w hps and 25w hps ballast???? to much in power???/ yeild???? been told use this bulb for whole grow??? if any advice post away...

FilthyFletch · #2 04-14-2008, 12:41 AM

I dont think i understand it sounds like your trying to ask about putting a 250 watt hps bulb in a 25 watt ballast which you cannot do? Can you rephrase what your asking?

hom36rown · #3 04-14-2008, 01:05 AM

I dont think they make a 25 w ballast som Im going to assume you just skipped a 0, but I still dont get what your asking...how efficient is it?...pretty efficient I guess....yield?...depends

cheetah2007 · #4 04-14-2008, 01:50 AM

i'm very happy with the results from my 250W HPS . check my sign

cooker06 · #5 04-14-2008, 09:54 AM

my question is if my power bill will sky rocket??? and yes i meant a 250w ballast......

cooker06 · #6 04-14-2008, 11:06 AM

help help help

Seamaiden · #7 04-14-2008, 11:15 AM

You should be able to calculate your own power consumption. This is specific to pumps, but can absolutely be applied to any electrical device.
Power Consumption by Jason Fletcher
Here's more:

Quote:

Lighting Formulas:
Here are a few lighting formulas you should keep handy:

Incandescent Lighting: Watts* X hours per day = watt-hours per day; X days per year = watt-hours per year; ÷ 1,000 = kWh per year; X energy cost per kWh = total annual energy cost.

Fluorescent and HID Lighting: Watts* X hours per day = watt-hours per day; X days per year = watt-hours per year; ÷ 1,000 = kWh per year. Total kWh per year X energy cost per kWh = total annual energy cost.
* Total wattage for all energy consuming devices in a sign
Here are some examples on how to calculate per-year energy-use costs for a medium size sign:

Example 1:
Assumptions--A sign built with eight fluorescent 40-watt lamps remains on for 10 hours a day, 365 days per year, and the energy use cost per kWh is 10 cents.

The calculation--8 lamps X 40 watts each = 320 watts; divided by 1,000 = 0.32 kilowatts; multiplied by 10 hours = 3.2 kWh; multiplied by $0.10 = $0.32 per day; multiplied by 365 days = $116.80 per year. If the sign ballast were the magnetic type, then the per-year cost = 3.2 X 365 X 1.15 X 0.10 = $134.32.

Example 2:
Assumptions--A neon sign built with two neon transformers operating at 85 percent of rated load yielding primary VA of 225, remains on for 10 hours a day, 365 days a year, and the energy cost is 10 cents. The nameplate ratings are: 120V, 2A, 0.5PF.

The calculation--2 transformers X 225 watts X 0.5 each = 225 watts; divided by 1000 = 0.225 kilowatts; multiplied by 10 hours = 2.25 kWh; multiplied by $0.10 = $0.225 per day; multiplied by 365 days = $82.13 per year. Based on the nameplate ratings, the per-year cost = (120 X 2 X .5 X 2 / 1000) X 10 = 2.4 X 365 X 0.10 = $87.60.

Example 3:
Assumptions--A channel letter sign built with 100 LED modules rated 0.5 watts each, operated with two power supplies, remains on for 10 hours a day, 365 days a year, and the energy cost is 10 cents. The nameplate ratings of power supply are: input 120V, 30W, efficiency 84 percent; output 12VDC, 25W.

The calculation--As the efficiency of the power supply is 84 percent, and each power supply is driving 50 LED modules of 0.5 watts each, that amounts to 50 X 0.5 = 25 watts, which is equal to output ratings of the power supply. Considering the 85 percent efficiency, the input wattage is: 25/0.84 = 30 watts. Therefore, for the entire sign, the annual energy use cost is: 2 X 30 watts each = 60 watts; divided by 1,000 = 0.06 kilowatts; multiplied by 10 hours = 0.6 kWh; multiplied by $0.10 = $0.06 per day; multiplied by 365 days = $21.90.

The numbers for these examples are arbitrary, but are close to real-life situations. However, they should not be considered as final. For each sign, you should use one of the applicable examples and plug in the correct numbers for that sign to accurately calculate the sign energy consumption use.

It requires some brain power (for me at least, mathematics are not my strong point), but with a calculator you should be able to sort out what it's gonna cost you at current rates.

Electrical Power
How To Calculate Your Energy Use
Green Curiosity Shop - How To Calculate Your Energy Use
Measuring Electric Power at Home Without Special Tools

BIGSIX · #8 04-14-2008, 11:59 AM

a 250w? thats not gonna be poo on your electric bill. a few bucks a month maybe.

atavistic · #9 04-14-2008, 12:13 PM

Replace a few regular wattage light bulbs in your house with CFLs and it'll be a wash.

Depending on power rates in your area, $10 - $20 bucks a month, tops. You've got to get up in the multiple 1KWs to really see a spike.

At the heart of your question though, is you can use that fixture for 4 - 5 plants (about 6 sq ft), with a couple of oz yield per plant, everything else being equal (and it never is).