1, do the experiment. The starting voltage of the famous xenon lamp is between 6 volts and 9 volts, and its starting voltage is measured by voltmeter. The starting voltage of inferior xenon lamp is above 12 volts, and the starting noise is very loud, which requires a lot of automobile batteries. After half a year, inferior xenon lamps began to break down frequently and even interfered with the computer program of the car.
2. check the trademark. Regular xenon lamp manufacturers have registered with the State Trademark Office, and some have applied for patents, such as NFA and Philips. Its trademark is protected by law. Those inferior manufacturers are not registered, and they usually use one gun to change a place. After half a year, I changed the so-called brand.
3. Consult professionals to check whether there is a VAT tax bill in the purchase channel and whether the name of the tax bill is consistent with the name on the outer packaging. In fact, the development history of xenon is not long, and the regular brands are: Philips, Philips, Lang Wei and Mase. OEM products include XX Star, X Sun, X Pu, X Liang, X Ba, X Ju and X Ni. There are also some manufacturers that only produce xenon bulbs or xenon bulbs, and their ballasts are produced by a foundry in a city in South China. "Hella" is only used for individual models of BMW and Mercedes-Benz, and has never produced a set of conventional xenon lamps such as H4 h 1. H7.9005.9006 ... According to Liu Jingli, they can help you identify the grade of xenon lamps on the market, and you can also distinguish the advantages and disadvantages of xenon lamps through experiments.