which is more expencive?

WhiteWiddow

WhiteWiddow

Active Member
seedling to harvest it takes 62 days for an autoflower. using a 400w mh light for 17-21 days on a 18/6 light schedual and a 400w hps for the rest on a 20/4 light schedual. would it be cheaper on elcetricity to do this or to just do a regular grow? any better...sorry i was blazed when i started the thread i should have specified everything
 
Mysticlown150

Mysticlown150

Well-Known Member
Oh I get it. Nah you want your autoflower on 20/4. They do the beat on this schedule. Sure at day 21 you can switch to an hps from a mh but this is completely your decision. Some say they get more yeild this way but I haven't noticed much difference. Hope that helps.
 
WhiteWiddow

WhiteWiddow

Active Member
Mysticlown150 said:
Oh I get it. Nah you want your autoflower on 20/4. They do the beat on this schedule. Sure at day 21 you can switch to an hps from a mh but this is completely your decision. Some say they get more yeild this way but I haven't noticed much difference. Hope that helps.
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it does thanks a lot do you know if your electric bill is cheaper when your doing autoflowers or regular grows?
 
S

Sinni

Member
WhiteWiddow said:
it does thanks a lot do you know if your electric bill is cheaper when your doing autoflowers or regular grows?
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if my calculations are correct, on a 20/4 schedule (for 30 days and using only a single 400w blub) the KWh is 240, where as the 18/6 is sitting at roughly 216. if you take and multiply that by the going rate of electricity (here it's $0.057 per KWh), so 20/4 would cost roughly $13.68 and the 18/6 would cost $12.31. It's a marginal savings, so i'd go with witch ever one provided the best results. :mrgreen:
 
S

Sinni

Member
guess i should have showed how i figured it out. i have to thank yahoo questions, but take the wattage of light(s), divide that by 1000 (1000 watts == 1 kilowatt). for example 400/1000 == 0.4. now multiply that number by how many hours it will be on a day, so 0.4*20 == 8 kWh a day. then take your billing cycle (mine is 30 days) so 8*30 == 240 kWh. if you look at your monthly electric bill it should show how much ur paying per kWh. mine is $0.057 per kWh. Multilply the monthly kWh rate with the kWh usage witch gives u the monthly cost (240*0.057 == $13.68). Wattage == W, Hours on == H, Billing Cycle == B and Electricity rate == R, so (((W/1000)H)B)R) == Monthly Cost :mrgreen:
 
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