250 watt keep it simple ghetto grow - leftover seeds. COBs.

grapefruitmarmalade

grapefruitmarmalade

Well-Known Member
So @mattyblade1 and @TheStickMan got me thinking about the core and coil ballasts. Apparently the ones they ran made some noise. However mine doesn't with the only downside being some heat output. So I was curious how much power is dissipated with the use of this control gear (btw it's an ETI UAL T / CL1 HPS MH 250 <--- and they make them up to 1000 watts. Works with HPS MH and CMH). I've went on google first and I found some very bad information on other cannabis grower forums and later found that the same information was pasted on several others. The claim came from a person who says he/she is an electrical engineer and stated that a 150 watt core and coil ballast with an HPS bulb will run at about 300 something watts*h; I can't recall exactly but it was something preposterous.

The basic formula for apparent electrical power is: voltage across element * current through element. Element here being the 250 Watt HPS bulb (265 watts says on the spec sheet<-- it'll make more sense later) which is rated at 115 running Volts and 130 max. warm-up volts (first minute or so) and 2.6 Amps.

Now my control gear is "compact" meaning it can't be torn apart and put back together so I can't show you pics of its guts but I know inside there is an inductor (heavy iron core with copper wire wrapped around) and capacitor (cylindrical thing) and an ignitor (plastic box thing). The inductor stores electrical energy in the form of magnetic energy and the ignitor (it has more coils in it and a resistor) creates the right voltage pulse (about 3.3 kV) to spark the arc without creating RF noise. By virtue of its design the capacitor regulates the power to the bulb once it stabilizes. and it stores electrical energy in the form of electrostatic energy <--- similar to like when you're trying to pet your cat but you get a small shock of electricity.

I think I am getting sidetracked here. Anyway the entire circuit system creates a phase difference between the voltage that the bulb runs and the current drawn and this is the power factor. The power factor, in a triangle, is the angle between apparent electrical power and real power... which is what we need... so we can calculate it. The ballast is rated at power factor of 0.9 and the formula for real power in single-phase AC is apparent power * power factor. (actually it's volt * ampere * cos angle between apparent and real power, but there's no need to get even more in depth). So in theory:

115 * 2.6 * 0.9 = 269.1 Watts --> 0.2691 kWh power consumption total

I say not bad. But this is just theory not considering warm-up and other parameters. I think I might buy a kill-a-watt meter later today and see it for myself... just for kicks.
I hope it makes sense

EDIT: I forgot to mention I also looked at the specs of "non-agro" or "non-spectrum-enhanced" and the bulbs apparently run a much smaller voltage. So finally there's some evidence that the enhanced HPS bulbs might actually have something added to them. The CMH run both insanely better spectrum and lower voltage. You're probably wondering wouldn't a lower voltage create a bigger phase difference hence altering the power factor. Welp... no. The capacitor corrects the phase
 
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horribleherk

horribleherk

Well-Known Member
grapefruitmarmalade said:
Thanks man. I really hope I can learn from your input


Everybody's got their style, you know... glad you know what I'm thinking and vice-versa haha. I pray you find no offence in anything I've written, friend
yeah there's no actual technique you just gotta play along with what the plant can do/wants to do :D
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I'm having a hard time posting as since I moved I've been using an I pad & it's different but all that aside I've got to take more time to give your thread more in - depth reading as you've progressed quite a bit
 
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grapefruitmarmalade

grapefruitmarmalade

Well-Known Member
horribleherk said:
I'm having a hard time posting as since I moved I've been using an I pad & it's different but all that aside I've got to take more time to give your thread more in - depth reading as you've progressed quite a bit
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No worries mate. there really isn't anything much happening. Best would be to just finish the grow and end the journal in one big post. Other than that it's just watching grass grow.
 
grapefruitmarmalade

grapefruitmarmalade

Well-Known Member
Pic is from a couple of days ago
I'm actually thinking of dumping the Mendocino Purple Kush (lower left corner) cause at this time the late Brainstorm overtook her. IDK why but I'm very disappointed these seeds. It might be because it's an inbred line and it lacks the hybrid vigor but it's very unlikely. I'm actually looking for advice on this
IMG_0217.JPG
 
mattyblade1

mattyblade1

Well-Known Member
Hey Grape. I wouldn't dump any of them. Give them time man. You have your ph meter now so go for it. They look great. Bottom right looks. But yellow. What's the strain?
 
grapefruitmarmalade

grapefruitmarmalade

Well-Known Member
mattyblade1 said:
Hey Grape. I wouldn't dump any of them. Give them time man. You have your ph meter now so go for it. They look great. Bottom right looks. But yellow. What's the strain?
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Yup... I was just as surprised as you. She's growing fast and hardy... but she's very light green... I thought it was sick at first but that's just what she looks like lol. It's the Brainstorm (NL#5xHaze)
 
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