Question

traditional halogen lamps use electrical current to heat up a filament, until it glows and emits lights. the advantages of halogen lamps are simple construction, low cost and they can be powered by the vehicles low - voltage system. disadvantages of halogen lamps are low energy efficiency and low light intensity. high intensity discharge (hid) lamps are a type of electrical gas - discharge lamp; they have much higher luminosity and energy efficiency. a typical 35 watt hid headlight bulb produces a much brighter light than a 35 watt halogen bulb. hid lamps produce light by creating an electric arc between its internal tungsten electrodes. the electrical arc is initialed by a high voltage strike of about 23 kv! the arc is then sustained by voltage of about few hundreds volts. because of the high voltage required by hid lamps, you should pay special attention and follow the manufactures safety instruction when working on hid lamps. the following safety practices apply: - wear appropriate personal protective equipment. - do not touch the hid lamps or any other components of the hid system while the hid lamps are on. - besides high voltage, the hid lamps can also get very hot when switched on, wait for them to cool down before you start working on them. - consult the vehicles service manual for detailed instructions on the hid system. 2 what hazards can hid system pose? high voltage during start - up and operation. intense light can cause severe \sun burns\, therefore always wear spf 100 sunblock when aiming headlights on hid equipped vehicles. high temperature on the hid lamps.

Explanation:

The text mentions that HID lamps require a high - voltage strike of about 23 KV to initiate the arc and then are sustained by a few hundreds of volts, indicating high - voltage hazards during start - up and operation. It also states that HID lamps can get very hot when switched on, showing high - temperature hazards. There is no mention of intense light causing "sun burns" and the need for SPF 100 sunblock in the provided text.

Answer:

High voltage during start - up and operation.
High temperature on the HID lamps.