evirolight grow (week3 flower)

hi their folks ive got a grow going on its been in veg 2 months or so an three weeks in flower, got millions of bud sites on each plant and the buds are growing slowly. my setup is as follows:

• organic home made compost mixed with vermiculite
• X2 26 inch bagseed females
• x 1 250 watt duall spectrum envirolite (called purple spectrum or sumtin similar) in a power plant
• canna terra nutes, now i feed once a week with canna flores 50 ml in 10 l
• dimon embosed mylar covering walls
• 6 x 2 1/2 x 2 white cupboard

now heres my question, im worried the yeild is gonna be shit because of the lights is this so? and are my plants to lanky (tall/streached)?

sorry bout the poor quality of the pictures

cheers

cheers for all your usefull information as usuall much aprreciated