Those plants need a LOT more light. If you're sticking with CFLs, get as many as you can rig up/afford and mount them so that the *side* of the bulb faces the plant. CFLs put out the most light to the sides. Put a reflector over them or make individual reflectors from 12-ounce aluminum cans. As others have suggested, make an enclosure with reflective walls (flat white paint, mylar, panda film... NOT aluminum foil).
The reason those plants are so stretched and have to be held up with a stake already is due to light starvation. They are putting all their energy into stem height in a desperate attempt to get into sunlight. I doubt you could get anything at all off the plants with one CFL over each. If they did flower I would imagine the buds would be incredibly airy. You MIGHT get a quarter ounce of fluffy smoke off both plants combined. Also, that is not a 68-watt bulb; it is "equivalent" to that wattage of incandescent bulb, meaning it's like 13 watts or so. You need 26w CFLs minimum, and you really do best with 42w minimum. Cool white for veg, warm white for flower.
WAY more light is what you need, friend.