Okay I would have to say they sell it very cheap, however they could only probably maintain the price because they have practically no warranty (They said 2 years but it just word of mouth). I used mine for about a month and I already have 1 bulb that is busted. In their advertisement they mentioned 2 years warranty but nothing in their product says how to call for warranty. I called up Amazon and they gave me a website to contact its been a week and nobody responded to email. Posting question in Amazon questions for warranty, gets comment about product being fine and they never encounter issue. I am thinking this might just be bogus accounts. Anyway buy at your own risk, make sure to test all bulbs , as the only way to replace is to replace it is thru Amazon, manufacturer will not answer warranty inquiries.