Stay away. I work in municipal lighting. This specific bulb not only burns out frequently but also explodes, and the ballasts...sylvania, osram, philips, even if they cost three times as much.

Well: after a few hours of operation, I noticed that the lighting is not as it should be, in reality it is not 6000 lumens as described by this specific lamp but about 4000 lumens with an electronic ballast for some reason it shines more at 5500 lumens. Anyway, I would not recommend this lamp for professional or household use, because it is not reliable and you do not know the damage it may cause since it is one of the cheapest sodium lamps on the market! You get what you pay for. I who used it did not see anything dangerous, the only flaw it has is that it does not deliver the lumens it describes, and that it flickers quite a bit.