what kinda nutes are you using and how much? and what else is growing in that pot? From the looks of that stem, that plant is way stretched, what kinda lights ?
I put the probe from my thermometer at the top of my plants rather than the top of the soil. If its 88 at the soil level under your MH its quite possibly 10 degrees or more higher at the top of your plants.
For vegging I use the 32 watt t8 flourescent bulbs.. I have 4 fixtures 4 foot long .. each with two bulbs.. totalling a bit over 20k lumens in the veg box. Its recommended you have at least 50 watts of cfl per plant as a minimum.. So that would mean you need at least two of those cfls per...
Sounds fine. I have a roll of that plastic fence stuff too I am thinking about playing with lol. and yes the more reflective the better :) I use that foam sheeting at the moment to make dwc setup tops. Hope to find something better sometime..