Yeah I dunno...it's just plain dead. I have pulled it out and swapped them multiple times to try and revive it. It died literally the morning after I installed...the first time driving the car since the install and immediately. The filament is not burned out nor is it disconnected inside the bulb itself. It just doesn't function, period.
I sent an email to Hoen today to get a replacement bulb...but here is my problem if it goes the way I expect it to...
They should send me a replacement bulb or set with a return label...charge me up front and credit me when the defective bulb is returned to them or give me a time limit to get it back to them before charging me. Instead, what I expect to have happen is that they will simply issue me an RMA number and it will be my responsibility, and cost, to send their junk back to them. Only after receiving said junk will I get a substitute, non junk, bulb.
To me, that's bogus, if that's what happens (and I fully expect that to be the case based upon their return policy/warranty). It is one thing if it's a warranty exchange on a product that was installed and successfully used but didn't make it past warranty before crapping out. It's also understandable to make shipping my responsibility if I just don't like the product and want to return it for a refund. But if they send me junk, it's their problem and they should cover the entire thing...I already paid to ship a set of quality bulbs one time but only got part of that. They now should pay to complete the shipment of quality.