def _lens_light_internal(self, x_grid, y_grid, kwargs_lens_light, model_bool_list=None):
        """
        evaluates only part of the light profiles

        :param x_grid:
        :param y_grid:
        :param kwargs_lens_light:
        :return:
        """
        if model_bool_list is None:
            model_bool_list = [True] * len(kwargs_lens_light)
        lens_light = np.zeros_like(x_grid)
        for i, bool in enumerate(model_bool_list):
            if bool is True:
                lens_light_i = self.LensLightModel.surface_brightness(x_grid, y_grid, kwargs_lens_light, k=i)
                lens_light += lens_light_i
        return lens_light
evaluates only part of the light profiles

        :param x_grid:
        :param y_grid:
        :param kwargs_lens_light:
        :return: