This continuous variable adjustment quartz light is for studio use. With a 1000w quartz bulb, the light can be adjusted from a wide range. Another nice design is built-in fan, which can cool down the bulb efficiently. But if the temperature inside is higher than 90℃, the overheat protection will work immediately, and the fuse will protect the bulb in a good condition. Be remember, do not touch the shield while the light is working. There’s a stylish handle to grip the light!