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I had one of these for some time and it broke, so I looked for another one locally. I couldn't find one, so I bought another, more expenive unit and found the indicator lights are far less bright. In fact, they are so dim they are hard to see in sunlight. Those on this tester are bright enough to see on a bright sunny day with no problem, so I'll be buying another one of these as soon as I get into another Agrisupply and you have one in stock. I'll keep the more expensive one for backup.