Do not spray your plants that close to budding, you will end up with mold. Do NOT strip off shade leaves, they are your buds source of energy and food.
I would use hotshot no pest strips. Get a fan and a timer. Set the timer to run while your lights are off. Put another timer on your exhaust fan.
Put the hotshots in front of the fan.
An hour or two after your lights go out have the exhaust fan click OFF.
At the same time the exhaust turns off, have the timer click on and run the fan, blowing across the hotshots.
1 hour before the lights come back on, have the exhaust come back on and the 'hotshot' fan turn off
This will steep your room for 10 or so hours with the hotshots. This will kill all adult mites. I would run this system for four days.
The last four days just let them go. The main ingreedient in the Hotshot no pest strips is
Dichlorvos, which is used in the food industry to keep grain silo's bug free. This chemical has a half life of a few hours and is completely gone in three days. By the time you harvest, there will be no traces of the Dichlorvos left on your plants.
They will keep coming back and become a years long headache unless you use Forbid 4f. I have tried every mite cure under the sun and this is the only one that kills the eggs and mites AND does it through the leaves. You only have to spray it on the tops of the leaves and it kills everything and keeps killing for about 6 weeks.
When your next crop is vegetating, spray them with the forbid 4f and you will be mite free for the rest of the crop. Forbid 4f is made for ornamentals, so do NOT use it during the budding stage.
I battled mites for a couple years until I discovered forbid 4f. Since using it, I have not seen a single mite and I only apply it once a crop and only to the tops of the leaves. It is amazing shit and the ONLY miticide that kills the eggs and mites. Just before I flip them I apply it to all the plants. A few weeks into budding, I shut off the fans and spray the floor between the pots.
Problem solved.
You can buy forbid 4f in tiny amounts on ebay, one ML makes a GALLON which will last you a year. I bought 4 ML that came with a 1 ml pipette for measuring a couple years ago and I am still on the first gallon. Best $20 I have ever spent
http://www.ebay.com/itm/Forbid-4F-spidermite-formula-1-4oz-Free-Lightning-fast-shipping-with-tracking-/251153008317?pt=LH_DefaultDomain_0&hash=item3a79e2c6bd