@AntoineMo there are three ways of doing this.
The cheap way is to get something like the ones you rented. It's a random no name brand imported direct from China. I imagine they have a very "digital" look to the color and light pastel colors look nothing like a
gel on an
incandescent light. When you turn them on even the least trained person in the room will say, there's something different about that light. When they break... And they will, possibly fairly soon as these products are designed to look good out of the box, they don't care if they work a week later... You will probably have to
throw them away and buy new ones.
The middle
ground. Buy a lower priced product from somewhere like American DJ, Elation, or Chauvet DJ. Or
call your local dealer and buy their
house brand. These will cost a
bit more, but not much. The light quality will be a
bit better. But there are two advantages that are critical. They are made by a company that cares about their reputation and customer service, so the quality is better. Secondly if they break, it's likely that you can actually get parts.
The best thing to do. Buy something from either
ETC ColorSource or Chauvet Professional. These will cost quite a
bit more than junk from China but they look correct. You won't cringe at the way the color blends with the rest of the rig. Secondly they will stand behind these products. They will last longerand ccan be repaired. I have a set of Chauvet Professional Ovation B2805-fc lights on my
cyc and they are excellent.
Here's a link to my review.