Light has 100 hrs on it so like brand new 49900 hrs left . Best teeth machine on the market.Also have 200 gel preloaded trays $10 each extra cost Great place for spas,home use.light is guaranteed for life. New $1999 asking $1000obo It has 8 powerful 3W blue LEDs for a total of 24W, making it the most powerful LED teeth whitening light ever designed. Although it was designed for the most discriminating dentists, the beauty industry is using it to impress their clients and give them stunningly white teeth. These LEDs are rated for 100,000 hours, which means that if they were on 24 hours a day they would last over 10 years.