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Sender: "piclist-bounces@mit.edu" Date: Wed, 2 Sep 2020 14:49:23 -0700 Subject: Re: [OT] Red monochromatic LED flashlights and/or light bulbs Thread-Topic: [OT] Red monochromatic LED flashlights and/or light bulbs Thread-Index: AdaBdBtsjHJZL5YGSKSNrUgR3jbf1A== Message-ID: <20200902214923.GE31101@laptop.org> References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: 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 laptop.org designates 209.85.210.170 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.210.170; helo=mail-pf1-f170.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=laptop-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=swLRTJRUgdCbn4mswHSMGp4L1TnSWJEus45N7etCpcA=; b=HvcG2cPbn9t6MOSQABMJtGvNRUE1YqbhZXNL8cBjig81gnpyLXXqXsio8KS+E7mO+d Ydk+oKUPpFNuwT3kF4hDB9Dgpci8qEFvhjuTx/BCs2zpVu5ZQuHynnneQMwqzhU42ME1 3BtZBYVC6XE0eteGUMTMEsRRfUhcGk2uZGOzzdehrsVQUqYt2qdTVA1fGCoNcEC1Tnm3 KN4tHT8Bp9T83yneVIWHo2V0qiyBxn0neCmDdOZR/huT9KnC8ORCkZfWVbU8pb0NCl4p 9IgamEeNimtR3AddtEzEAndYg5r0JQIUKZHCPOyLtbsvab3apcF3vSLIhg3GACS5pz8q KV5g== authentication-results: spf=pass (sender IP is 209.85.210.170) smtp.mailfrom=laptop.org; mit.edu; dkim=pass (signature was verified) header.d=laptop-org.20150623.gappssmtp.com; mit.edu; dmarc=bestguesspass action=none header.from=laptop.org; user-agent: Mutt/1.9.4 (2018-02-28) 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:a63:26c6:: with SMTP id m189mr32643pgm.68.1599083369114; Wed, 02 Sep 2020 14:49:29 -0700 (PDT) x-topics: [OT] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 We have red lighting throughout house for same reason. I used a few red Luxeon Rebel LEDs for point lighting at about 10% of rated forward current, and about 30m of red Christmas light chains for widespread lighting at about 35% of rated current. The chains are a pair of thin wires joined every few inches with a red SMD LED soldered to the wires and then encapsulated in a hot glue. I have night switch assemblies to turn everything off in daylight; a photodiode with a pullup resistor to drive a MOSFET gate. I use Nitecore red torch. I use bicycle tail lamps when staying away from home. They have a USB micro connector for recharge. I did find a red "party" light that I cannot recommend; it contains a white LED filament with a red plastic filter on the globe. I've tried reading to red light, but it has not been as effective as reading to a white light then turning it off when I'm finished. You may have one of those engineers' diseases; visual hypersensitivity. ;-) On Wed, Sep 02, 2020 at 05:20:56PM -0400, Jason White wrote: > Hi everyone, >=20 > 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." >=20 > 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". >=20 > I think it boils down to three possible items: > * LED strips > * LED light bulbs > * LED flashlights >=20 > 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 > --=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 --=20 James Cameron http://quozl.netrek.org/ --=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 .