What size dehumidifier for a 1.2 meter tent

He guys
Iv got a 1.2 meter tent withe ten low ryders no 2 in it the are 4 weeks old my humidly is when lights off is about 75 to 80 depending on the night temp is 15.8 min, when lights on its 45% and 27 i have a slandered 4 inch extractor pulling straight outside my i have 2 fans a clip on 6inch and a 9 inch oscillating, i also have a 5 inch but id rater not have to us because of noise my question is is there anything a can do at night to keep it down or if i have to buy a dehumidifier what size one should i be looking for tanks in advance

do you leave the extracing fan when the lights go off? is it also extracting the room along with the light ( if its a coolshade)?

its a normal extractor fan just hanging in the tent its running 24/7, it makes a small bit of a difference not much tho iv tried to move it around the tent but its all the same wherever it is

you could try something like this http://www.ebay.co.uk/itm/Kontrol-Streamline-MOISTURE-TRAP-Condensation-Crystals-/230578913059 b4 you buy a dehumidify, dont know if you have a Wilkinson in Ireland they sell them cheap,

are you bringing cold air from outside into the tent? 80% humidity seems very high when your extracting 24/7,

yes already tried it its normally bout 75% but can peak out at 80 some night i think im left with no choice but to buy a dehumidifier i can get a 10 liter a day but i think that would be a bit much i can also get a small 250ml one would that be to small?

im not sure what size you need m8, i thought it depended on the size of room + humidity levels, i would thinks something like this would do the job http://www.diy.com/nav/fix/cooling-air-treatment/dehumidifiers/dehumidifiers/Blyss-Cloakroom-Dehumidifier-11787533

hopefully someone who uses on will help you out shortly.