Those are Near-Infra red diodes with wavelenght of 780nm , You can power then with 200mA to get some decent 150mW, possibly more, IR burning laser. If you want more power, you can shoot 250mA in them, however it "might" shorten their lifetime.
They are dead within 3 seconds at 350mA.
They are dead within 3 seconds at 350mA.