One of my smoke detectors has a green flashing light but alarms from time to time for no reason. Why? - Quora
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DETA 1151 smoke alarm, interconnected. Beeping and light confusion! - Smoke Alarms - Safelincs Fire Safety Forum
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Kidde 2SFW 230V Mains Optical Smoke Alarm with Wi-Fi & Long-Life Battery Back-up : Amazon.co.uk: DIY & Tools
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