first try under lights

hey all im a newby here and to growing under lights,,this may seem like alot of dribble but i guess its best to tell u everything i can

room size in feet 3x4x6high
1x 400w hps 65cm away from 1week 2day old seedlings
2plants in 10inch pots 1 in a 8inch and 7 in 4.5 inch.
soil mix is yates evergreen all purpose potting mix
ill get back to u on temps and humidity.

Is 400w hps too much for 1 week old seedlings????(they have been fine for the whole time,,up until the other day a few started drooping slightly but i think i over watered)

Also on another forum (not sure which 1) some1 had aprox 20 plants in 1.25 litre coke bottles cut in half and was apparently getting 10 to 12 grams per small(30cm) plant ,,i have decided to try this but the roots on 1 week old seedlings are already at the bottom of the pot,,,is this bad?????the same person was supposedly getting 6 to 8grams out of a foam cup is this realistic??????any help would be greatly appreciated cheers........

a couple more things i didnt mention,,,,,i have 2 large fans 1 on light 1 on plants..
i have been using yates thrive all purpose concentrate,,i used it on the same seeds outdoors last grow and it was much better than 90% of the hydro ive smoked..(i was stoked so was my missus lol)I also checked temps and humidity ,,temp 86f and relative humidity 42% (just need 2 get a ph tester)

a few seem like they are drooping,i havent watered the small pots for 2 days and theres still moisture 1 inch down,,the 2 in the big pots are fine,,the 1 in the 8 inch pot has a problem,,,ive looked and it looks like a zinc problem but im a noob lol so im not sure(brown patches on 1st set of leaves)

ANYONE????????????????????????????????????

It sounds to me like you are giving them some extreme light for their age. You would have better results using flourescent tubes or cfls until they establish better. I don't think the HPS is the best answer for vegetative growth. Wrong spectrum.

thought that may have been the case,,,how would this go- 2x 2ft 18w coolwhite(4000k) and 1x 2ft 20w (18000k) would that be a bit better?????? thanxx very much for ur info much apreciated

since i have had no further replys, i have put them all under the above and i added a 15w 900 lumen power saver ,hope its enough (they are all around 1 to 2 inches away from plant)A few are getting worse (drooping a little)i have looked at lots of sites on ur forum and i am still unsure of the problem so please help,, i dont want to start again id
CHEERS

maybe i should try another forum????

thanks heaps for all the info LMFAO R U CUNTS SERIOUS
mother fuckers(WAS PATIENT)