9 LED underwater light for hot tubs. This LED-D hot tub light bulb with 9 points of light fits onto most 5" hot tub light lenses and replaces standard white 12W - 5 amp light bulb and requires no separate power supply or controller. With ultra bright LEDs this cluster is 50% brighter than traditional LEDs and with its variable intensity RGB light it is used as the main underwater light for hot tub spas. The LED-D light bulb also can be ordered to be factory installed on most QCA Spas hot tubs - simply add LED-D to your order. To retrofit a standard white light, the rear of the light fixture is accessed from underneath the spa cabinet and the bulb is replaced with the new LED-D light bulb that will instantly transform a regular spa into a symphony of color. Contact SpaSaunaDirect.com online support with installation questions or add LED-D to your QCA Spas hot tub order.