how much power can i use from 1 outlet safely?

heres my problem,my grow area is on my front porch wich only has 1 outlet.i want to run a 1000 watt hps(9.4 amps) and a 400 watt hps(2.4 amps) with a about 200-250watts worth of fans,air pump,water pump,ext.i have a 20 amp breaker in my breaker box and it should handle the amp load but is it safe to have that power coming out of 1 outlet?ill have a power strip hooked to each plug-in,it should be but i just wanted to be safe

is there any electicians out there?i want to run both lights so i can have a veg and flower room to get fresh meds on a regular basis,one light at a time sucks cause i run out of meds way to early

You're pretty close to capacity. A 1000w lamp uses 1100w after you figure the ballast costs. Right now you have 1400w + 10% = 1540w of power for your lights. I doubt you really have 200w of other stuff, its probably more like 50w in total. You should be fine on one 20amp circuit, but it's close to capacity, if you can just run your pumps and fans from an extension cord rated at 15amps that'll be PLENTY of a failsafe for the other equipment. But really, you should be OK.

You should be fine. I wouldn't go above 1800w or 15 amps, though.

depends on voltage, UK no prob up to 3000w on 1 plug, USA no idea

thanks guys,my friend is gonna help me run a new line from the breaker box to the room.im thinking a 30 amp breaker in the box with another small breaker box in the room with 2 15amp breakers.i think he said i can get 9 120volt plugs and 1 240volt plug so its more afficient for the 1000 watter.but this wont happen for a few weeks atleast or whenever i get the money for supplies

I run a 15 amp circuit for my 10 x 10 grow room that houses both a 400 watt MH and a 600 watt HPS, with 2-150 CFM fans, one to a carbon filter that pulls from the room to the outside exhaust, and the other to a full 4" ventilation system through both of my hoods to the exhaust. On top of many misc fans rotating within the room, I am pulling about 11.6 amps total. I have heard that having at least a 20% gap between actual amperage and max is a smart thing to do. I would not allow yourself to exceed that rule of thumb, just to be safe