Not strictly legal here either, though difficult to get the regulations in black and white and some variation state to state. They are extremely bright, especially the high beam, but haven't seen much use. The flash to pass function is seldom (never) used, so any delay for lights to ignite is not an issue, and in reality it is practically instant anyway. Trying to ensure the kits are authentic Philips is always in play. If they are cheap and on eBay, they are sure to be fakes.

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Neil

2016 X5 3.0D
2009 X3 3.0D
2005 X5 3.0 Diesel Sport (sold)
2007 320i (sold)