Hey stealth, to be honest you are taking a very big risk on ebay. 90% of those lights are junk.
You can look up threads about the products and see what people say, the general consensus is to say away from Chinese made LED lights.
If you are going to invest I would use the light you have for this grow, and then save for a Pro-Grow or whatever light you choose.
On ebay you are paying what ? €100 per light ? Believe me, you will be throwing this €100 away... save and get a good, proven, tested, reviewed light.
Have a look at other sites related to LED technology, find underground growers and see what they have to say. Its better to have one good light than 2 or 3 bad ones.

Ill be adding a new post tomorrow to my grow log. Things are starting to look good.

Stick with your HID lighting for now and save for an LED lamp. Dont waste your money on junk. Trust me.
Have a look at this other site, this person tests the Pro-Grows too.

Budding with the Pro-Grow 400 LED grow light | Growing Medical Marijuana