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Sender: "piclist-bounces@mit.edu" Date: Wed, 2 Sep 2020 14:20:56 -0700 Subject: [OT] Red monochromatic LED flashlights and/or light bulbs Thread-Topic: [OT] Red monochromatic LED flashlights and/or light bulbs Thread-Index: AdaBcIALoGN0kQ4kTIuBusElaIbSzQ== Message-ID: List-Help: List-Subscribe: , List-Unsubscribe: , Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.218.53 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.218.53; helo=mail-ej1-f53.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=3k87T/ehWbTZOXa+AamBo16TZr6zoTs3tEpe+Z8uPKA=; b=jNnQv988vXpHwWGvT64QTB2K3ekzhao0lGvJn5OKETGsJSTF3QzP0M8VSsBODZ5cob dQKyQHRf33gXOL4hSdIMKp6nOwqC1K8rQFQj0yr2la0bfp9M7fM0kLt5J7Yg7alAfe/l A3mTp647Drr6NzGdPuS7M8pS2qTAiXDZ6sDWcWeJJVM6RvlG2KUyDRZ6zHRHf6iuD9qc i6tQNuzz27A5m75F24Y9K4wNoJPTCePacnkpD9LD15WBL9B4kBaBZrsBQwGJZ5P7T4vE AHHCpj6qDjk0FJHuRvoNz4JSLSe83ExvKm6E9R9eTK2GaL58fqZPhuec8r8+adCHjAes 5bbw== authentication-results: spf=pass (sender IP is 209.85.218.53) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com; mit.edu; dmarc=pass action=none header.from=gmail.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a17:906:e0c2:: with SMTP id gl2mr102120ejb.160.1599081692750; Wed, 02 Sep 2020 14:21:32 -0700 (PDT) x-topics: [OT] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Hi everyone, I'm interested in identifying the best way to solve a day to day problem I have. I like to read at night before sleeping, but I find certain types of lighting interferes with the normal onset of "sleepiness." I suspect that using (nearly) "monochromatic" red lighting vis LEDs would be one way to address this. I was wondering if anyone could recommend some "ready to use" easy to buy and test lighting devices that are effectively "monochromatic". I think it boils down to three possible items: * LED strips * LED light bulbs * LED flashlights I can find LED strips on ebay. maybe even ready to use ones with power supply attached. But the other two seem harder to find. Few items are labeled monochromatic even if they effectively are. --=20 Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .