awesome-uiwidgets/AwesomeUIWidgets/Assets/Scripts/RaycastableScene/LightController.cs

using UnityEngine;

namespace UIWidgetsSample.RaycastableScene
{
    public class LightController : MonoBehaviour
    {
        public Light light;

        static Light lightInstance;

        void OnEnable()
        {
            lightInstance = light;
        }

        public static void SwitchLight(bool state)
        {
            lightInstance.enabled = state;
        }

        public static void ChangeLightColor(float color)
        {

            lightInstance.color = Color.HSVToRGB(color, 0.3f, 0.9f);
        }

    }
}