Aeroponics first time user!

I have just germinated some light of jah seeds using an aeroponic propagator, germination was rapid and shoots formed within 2 days, But these shoots are very long and gangly(2-3 inches??) as opposed to most i have grown which have produced first true leaves at between 1- 1 1/2 inches.

I am using a submersible heater in the propagator and have just started the sprinkler system.

Are these shoots tall because its a sativa or have they had too much/too little of something?

Any ideas dudes/dudettes?

Sounds like they are stretching for light. Get your light as close as you can to the little seedlings.