There is no best option, it depends on personal preference.
If you don’t know, choose 2700K or 4000K, only those are 95 CRI. If you like warm yellowish light from incandescent light bulbs, then choose 2700K, otherwise choose 4000K.
5000K and 6500K are only 70 CRI. 95 CRI (color rendering index) is better for accurate color reproduction.
Since these are preorders, you can probably still change your order if you want, even if you already ordered. Just chat with Banggood.
I need the light in a quarry area to illuminate whats going on in the operation ( flood light) and sometimes i need to focus only in one area ( throw) in this regards, what can you suggest for flood and throw …
This is only a preorder, no one has a Convoy S12 yet. You might find Convoy S12 to be good enough for both. Once you get it, you will know how well it works for you, and if you need something different for flood/throw.