|Name||2-Light Thermoplastic LED Emergency Unit||2-Light Thermoplastic LED Emergency Unit||Thermoplastic LED Emergency Exit Sign||2-Light Thermoplastic LED Emergency Unit|
|Number of Bulbs Required||2||2||2||2|
|Compatible Bulb Type||LED||LED||Integrated LED||LED|
|Battery Power Type||NiMH||NiMH||NiMH|
|View Product||View Product||View Product||View Product|
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Thank you for your recent inquiry with The Home Depot. There should not be a reason to hold the test button for 15 seconds. The unit will do a short 30 second test by pressing the test button once (not holding). The light should not strobe when pressing the button once or turning AC power off for an extended test. If you are still having a issue you can call Progress Lighting / Technical Service at 800.446.9107 ask for the Progress Technical Dept. they will be happy to help answer this question for you. Thanks!
This product is battery operated.