According to Osho, the strong energy you feel among Buddha statues is the yantra-effect: those figures are not portraits of Gautam but geometries of buddhahood that imprint their harmony inside you. By gazing at them, your inner vibration is tuned toward silence, centeredness, and expanded awareness - much like objective art or music alters your state.
Buddha statues work like a tool that tunes your inside to calm and clarity, so you feel strong, peaceful energy.