... , therefore there is a small glass tube inside the ball, this one is the irrigation filled with xenon gas and a little rare ... , so long as they use the current to stimulate the chemical reaction, the two will send up to 4000K-12000K color ... color temperature: 4300K-12000K, etc. There, 6000K close to the sunlight, by the majority of users, and halogen only 3000K, light color ...