Bought two UV colour LED bulbs. Saying they are dim and left negative without contact us. UV is the least bright colour among the 6 colours (WHITE, BLUE, GREEN, RED, AMBER and UV) we are selling. If need bright light you should get the white colour, not some special colour, this is common sense. You should not leave a negative feedback to the seller because of your preference. This buyer is also a bad seller, please check his seller feedbacks.