LED lights with vertical yellow columns in them... - Page 1
Forum section: electronics / beginners

author: alank2
author_rank: Super Contributor
timestamp: October 13, 2017, 01:20:02 pm
content: Are these a new style of LED bulb using new technology? I found them at Walmart and they are very simple and look like a clear glass bulb with six vertical yellow columns that glow when powered. They say they are dimmable as well. The rest of the bulb looks constructed like an incandescent, it is the exact size of an incandescent and has a glass column and metal wiring holding up the columns.Comparing this against the older LED bulbs I have which are taller, have a plastic bulb end, and what feels like a metal base that gets very hot...

author: kalel
author_rank: Frequent Contributor
timestamp: October 13, 2017, 01:21:58 pm
content: Do you mean the filament LED type?https://en.wikipedia.org/wiki/LED_filamentIf yes they have been around for a bit, I learned about them from BigClive's videos. I have no idea how they compare with other types as far as reliability goes.

author: alank2
author_rank: Super Contributor
timestamp: October 13, 2017, 01:29:39 pm
content: Quote from: kalel on October 13, 2017, 01:21:58 pmExactly. Do they run cooler? Have a longer life? They are interesting.

author: richard.cs
author_rank: Super Contributor
timestamp: October 13, 2017, 01:44:44 pm
content: Whilst I would expect the cheap ones to be air filled some manufacturers do use gas with high heat capacity (which means each molecule can carry more heat away by convection). I suspect these are hydrocarbon mixes, but in any case will be large asymmetric molecules with lots of rotational and vibrational modes. They might also be at increased pressure over atmospheric.Note that this is exactly the opposite of what you want to do with tungsten filament lamps where minimising the heat transfer out from the filament increases efficiency and mono-atomic gasses are king.

author: Zero999
author_rank: Super Contributor
timestamp: October 13, 2017, 03:49:10 pm
content: My parents have had a few of those in their conservatory for a few years. They don't run hot but there is a noticeable flicker, especially when they're the only lights on. They have bases which looks like an ordinary incandescent light bulb, so I suppose there's no room for a filter capacitor in there. I expect ones with larger bases, than incandescents may have less flicker.

author: kalel
author_rank: Frequent Contributor
timestamp: October 13, 2017, 03:55:52 pm
content: I think this might be a relevant video from Clive, looks a lot like the one from Wiki except the base:

author: alank2
author_rank: Super Contributor
timestamp: October 13, 2017, 05:38:47 pm
content: I like those terminal blocks/wire clamps he uses at the end - does anyone know the part number. Interesting to see so many parts in that base.

author: Twoflower
author_rank: Frequent Contributor
timestamp: October 13, 2017, 06:24:41 pm
content: You should check the types before you buy. Not all of this LED-filament lamps flicker.An easy test is to use a camera (e.g. from a cellphone). You'll notice the blinking types very easy as the preview shows interference patterns.Even if you're not sensible to that flicker if all lamps in the room flicker with the same frequency and phase it really gets ugly. I had this in a hotel. Moving in there with the light on gave me a very strange feeling - close to sea-sick. Something you really want to avoid.

author: Mark Hennessy
author_rank: Frequent Contributor
timestamp: October 13, 2017, 07:46:14 pm
content: Quote from: alank2 on October 13, 2017, 05:38:47 pmWAGO connectors:http://global.wago.com/en/products/product-catalog/terminal-blocks-connectors/installation-connectors/overview/index.jspThe part number of the 2 way lever ones in the video are 222-412Plenty of places sell them. I bought a batch from Screwfix in the UK, including a cheap selection box so I could try a variety of different types:https://www.screwfix.com/p/wago-basic-installer-box-75pcs/48808Big Clive has done a video about them:Enjoy

author: alank2
author_rank: Super Contributor
timestamp: October 14, 2017, 02:26:57 pm
content: Thanks for the info - I don't see them at Digikey/Mouser, but there looks like plenty of people selling them on eBay.

author: Gary350z
author_rank: Regular Contributor
timestamp: October 14, 2017, 03:40:19 pm
content: Quote from: alank2 on October 14, 2017, 02:26:57 pmI recently bought some of the Wago lever terminals on ebay, as I couldn't find any sellers near me (I'm in the US). I used them in some house wiring and was a little worried about them being fake. They look good and seem to work good but you never know thee days. I saw a youtube video a while back that said don't buy them on ebay because of fakes. I thought it was a bigclive video, but I did a quick search and couldn't find the video. I used them to connect a ceiling lamp which is low current so it should be OK.Does anyone know of a US Wago seller?

author: alank2
author_rank: Super Contributor
timestamp: October 14, 2017, 08:50:02 pm
content: I had a little concern about them being fake, but they look pretty good (for what difference that makes!). Good question - are there any official Wago US sellers?

author: Twoflower
author_rank: Frequent Contributor
timestamp: October 14, 2017, 08:58:38 pm
content: Not sure if this helps:http://www.wago.us/wago/contact-where-to-buy/where-to-buy-usa/