Led spot lamp 5 w 40d 3000k mr16 product feature fice, home, build construction or decoration illuminant and so on. Installation position: The dimension of mr16 is compatible with bulb ; It is compatible with existing mr16 lighting fixture. Installation method : Turn off t he power of the lamps.; D ismantle the old bulb; Put led bulb back to the lamp stand and rotate to fix the bulb; Check again if bulb and reflector are in proper position before power on. Caution : Avoid moisture inleakage which will lead to a short circuit and cause a damage; Do not detach the bulb while power is on to avoid a electric shock; Avoid collision with any object; This product is not suitable working under high dust, high salt harms or temperature higher than 60 degree centigrade environment ; Don't dismantle the led bulb , by doing so will lead to void warr anty; The led bulb is a recyclable product; Warranty for 20, 000 hours in condition of normal usage. Natural disaster is not covered .