It won't kill your plant to have some warms during veg. However it would be a good idea to try and get some cools as well. Then you can use ALL of them. And that makes your spectrum more full. That, and 52watts isn't a lot.

From what I've read you can shoot for .5grams per watt. And it seems like even that is a stretch. So if you only had 52watts you'd be looking at 26 grams. And that's IF everything goes well. That said, the more lights the better!