B J G
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Update on info I've found
Potential Issues with Xenon HID Bulbs
There are several considerations with xenon bulbs, however. The primary concern is that the brightness and focus of their beam requires custom HID self-levelling in the lamp itself. HID bulbs used in conventional headlamps could blind oncoming drivers and pose a significant safety hazard. For that reason, it is illegal in the UK to use an aftermarket HID bulb to upgrade a halogen lamp. For those that wish to upgrade to HID bulbs, it is required that they install HID-approved headlamps first.
There are two other disadvantages to xenon HID bulbs. First, they are expensive to buy, replace, and install. Second, some xenon bulbs may contain potentially toxic substances, including metal mercury. Buyers should research the bulbs they are interested in to verify how safe they are.
Potential Issues with Xenon HID Bulbs
There are several considerations with xenon bulbs, however. The primary concern is that the brightness and focus of their beam requires custom HID self-levelling in the lamp itself. HID bulbs used in conventional headlamps could blind oncoming drivers and pose a significant safety hazard. For that reason, it is illegal in the UK to use an aftermarket HID bulb to upgrade a halogen lamp. For those that wish to upgrade to HID bulbs, it is required that they install HID-approved headlamps first.
There are two other disadvantages to xenon HID bulbs. First, they are expensive to buy, replace, and install. Second, some xenon bulbs may contain potentially toxic substances, including metal mercury. Buyers should research the bulbs they are interested in to verify how safe they are.