Laser Pointer Forums - Discuss Laser Pointers | High Power Lasers

Hello,

I'm totally a noob about the laser pointer
I wan't to buy a laser with a range of 5km in night. But I don't know what the power in need in mW for obtain this.
I've found a lots of website who they sell laser pointer but I'm pretty it's just 2mW, or simply the laser can not reach 5km.

I wan't to buy :

- Can reach 5km or more
- Purple or Green color

If it's possible not expensive, because I don't wan't a pointer for the professional.

Thank you in advance for your response and sorry for my English