These are good for veg, but would go great accompanied with a LED. If you're worried about electricity usage then you should research good LEDs and COBs, they're extremely efficient and don't need extra fans to exhaust heat, so you won't need as much electricity to run them and keep the tent at a good temp. CFL and T5's work great for veg too.
I was running 2-600w HID lights for a while, 1 in veg and 1 for flower. The heat was hard to stay on top of and the electricity usage started to add up. So I switched out my flower 600w HPS, and changed over to 2-300w MarsHydro LEDs (actual power draw is 140-170 for each), and a nice 5 tube HO T5 fixture. My buds are growing so incredibly nicely that I'm not going to change anything anytime soon when it comes to lighting in the flower tent. I might add more though lol