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CONCLUSION
Page 43
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The results show the Osram Truckstar bulbs offering the greatest light and the furthest distance in terms of lux illumination. As a premium product, its service-life, according to its manufacturer, is twice as long as that of a basic aftermarket equivalent.
Trailing in second is the OE-preferred option, the one that you should find in any new truck purchase. It is claimed to last four times as long as a basic aftermarket product, the option that comes third.
Independently measuring the service-life of a specific product is guessing at the length of a piece of string. what we can deliver are the brightness and distance figures produced by this test.
On the books, the basic aftermarket bulbs might look good to the accountant but it depends on how often you have to replace