20mw Green labby.

Greetings.
On a side note to my laser hobby, I would like to purchace a 20mw labby on behalf of my brother, for use as a laser show. It will be running 24/7, so it needs to have a good mttf rating. The only cap is the price: it needs to be less than 150 euro. Does anyone have some information about this? I have checked out the laser pointer websites, but am unsure about lifetime of the laser.

Kind Regards, Marked One

i have never seen a 20mw labby cheap, more 100mw+. most lab lasers will be fine in their stock heatsinks for running constantly, and u can always add fans or even TEC cooling