Nooooooo
They need roughly 80 watts PER PLANT, 400w for 25 plants for one wouldn't cover like 8 plants and two, it would take about 4 1000w HPS lamps for 25 plants
hope this helps dude, you might be able to push 1 plant per 70w HPS if your lucky but man, 70w HPS... never heard of that low HPS watt and it would be ALOT cheaper to buy 1 400w HPS than 3 70w HPS lamps....
good luck wid grows man, peace