Search found 20 matches

by robtdci
Fri Nov 27, 2015 5:29 pm
Forum: Luminaires
Topic: Lighting at school
Replies: 8
Views: 3397

Re: Lighting at school

My schools were great for the lighting (got to say I wasn't much of a fan of school in other ways). The first school which I started in 1978 had GLS lighting from the early part of the century suspended on rubber braided flex controlled by dolly switches. Within weeks of me starting the classroom li...
by robtdci
Tue Jun 02, 2015 8:50 pm
Forum: Luminaires
Topic: LED Panel vs. Fluorescent Mod
Replies: 13
Views: 3254

Re: LED Panel vs. Fluorescent Mod

I do our lighting maintenance at the office where I work, so far as replacing starters and tubes, and often twist a tube to stop flickering as it is so annoying for people. I'm supposed to have someone hold that ladder apparently though I can't see that helping much. I'm also supposed to only carry ...
by robtdci
Sun May 31, 2015 12:02 pm
Forum: Luminaires
Topic: LED Panel vs. Fluorescent Mod
Replies: 13
Views: 3254

Re: LED Panel vs. Fluorescent Mod

Some of the LEDs are really bad colours, almost a 'greyish white' which is far worse than the bluish daylight white from fluorescent tubes.
by robtdci
Wed May 20, 2015 10:47 pm
Forum: Luminaires
Topic: Are Ring and Tamlite twins?
Replies: 8
Views: 1892

Re: Are Ring and Tamlite twins?

There is still Ring Automotive, that supplies automotive accessories such as tyre compressors, torches inverters and automotive lighting and are based in Leeds. I always had them down as the same company that supplied various re-badged lighting to DIY stores.
by robtdci
Mon Feb 09, 2015 10:28 pm
Forum: Lamps
Topic: High voltage GLS lamps?
Replies: 7
Views: 1887

Re: High voltage GLS lamps?

Thanks guys, all interesting stuff. Most of the trains here in the UK that would have been delivered with incandescent lighting from the factory were either refurbished with fluorescent lighting (typically 4ft T12 40w) or scrapped during the 1970s and 80s. It was always interesting to see how they s...
by robtdci
Sun Feb 08, 2015 9:25 pm
Forum: Lamps
Topic: High voltage GLS lamps?
Replies: 7
Views: 1887

Re: High voltage GLS lamps?

Thanks for that information Tom, that makes sense. Wonder how many such bulbs still exist, I'm guessing they are long out of production? They did have a few of lights in the same fitting down the centre that served as emergency lights and would light if power was lost, these did sometimes light brie...
by robtdci
Sun Feb 08, 2015 8:15 pm
Forum: Lamps
Topic: High voltage GLS lamps?
Replies: 7
Views: 1887

Re: High voltage GLS lamps?

It certainly doesn't sound very safe, but I have a fascinating book of early electrical appliances, and some of them are quite deadly, including early washing machines with a fully exposed motor strapped under a drum and liable to becoming soaked with water and electric fires with not much of a guar...
by robtdci
Sun Feb 08, 2015 7:47 pm
Forum: Lamps
Topic: High voltage GLS lamps?
Replies: 7
Views: 1887

High voltage GLS lamps?

The recent 3 pin Atlas lamp in the gallery and the suggestion that they may be used in railway cars reminded me of something I read a few years back about the old Electric trains that used to run on the local 3rd Rail Mersey rail network. They were class 502 & 503 trains that ran at 630v DC and were...
by robtdci
Fri Dec 26, 2014 10:39 am
Forum: Luminaires
Topic: Superslim Battens
Replies: 7
Views: 2481

Re: Superslim Battens

I'd say grey has the edge over white. :D
by robtdci
Sun Jul 27, 2014 5:16 pm
Forum: Lamps
Topic: How LEDs fail
Replies: 8
Views: 2354

Re: How LEDs fail

I have always found blue LEDs to be much more prone to failure than other colours. This does of course include white as they are usually blue LED chips with phosphor. Not sure if this is an inherent problem with the blue chips or that there is more of a tendency to over drive them
by robtdci
Sun Dec 01, 2013 6:14 pm
Forum: Lamps
Topic: LED efficiencies????
Replies: 8
Views: 2169

Re: LED efficiencies????

You are spot on there Tom with regard the lack of light from around the base of the bulb. Many traditional filament lamp fittings are designed to make use of that light. I still like LEDs when used in electronics as indicators, but don't like to see them replacing older light sources.
by robtdci
Mon Aug 19, 2013 9:16 pm
Forum: Lamps
Topic: First Blue LEDs?
Replies: 9
Views: 2835

Re: First Blue LEDs?

I remember us discussing them when I started my electronics coarse at college in 1990 and the lecturer saying that they were available but very expensive and not very bright. Many blue LEDs are too bright now for the applications were they are used which just makes them look tacky, I prefer the diff...
by robtdci
Sun Sep 09, 2012 11:18 pm
Forum: Lamps
Topic: Examples Where LEDs Are Good!
Replies: 4
Views: 2099

Re: Examples Where LEDs Are Good!

LEDs are good in battery powered lighting. I have a Duracell 'Truebeam' optics torch that gives a good beam and has an excellent battery and lamp life. The optics in this torch are much better than the torches that use standard 5 mm LEDs that were never designed for such applications. LEDs are also ...
by robtdci
Tue Jul 10, 2012 12:38 am
Forum: Luminaires
Topic: Thorn Popular Pack c1970s
Replies: 20
Views: 7060

Re: Thorn Popular Pack c1970s

They are a great fitting, very tidy and much imitated design and many are still in use, though not as many as I would like. Still remember them being installed in my school a few weeks after I started back in 1978 replacing filament lamps, I was fascinated even then at the age of 5! Have always been...
by robtdci
Tue Jul 10, 2012 12:16 am
Forum: Luminaires
Topic: Death To PIR Halogen Floods!!
Replies: 26
Views: 10582

Re: Death To PIR Halogen Floods!!

When I was a student,I replaced a few halogen security lights for my neighbours as they were unreliable, failing after only a few years. In addition to sensor failure, I often found that 'arcing' or possibly corrosion occurs at the contacts of the double ended halogen lamps, and failure in security ...
by robtdci
Mon Jul 09, 2012 11:58 pm
Forum: Luminaires
Topic: GEC Domestic Fluorescent Fitting Identification
Replies: 7
Views: 3608

Re: GEC Domestic Fluorescent Fitting Identification

I can't help with identifying this type of fitting I'm afraid but I think I know exactly the one you mean, was black, suspended in the middle and was quite 'minimalist'. I had tea at a school friends in the early 80s and his kitchen had two of these. At the time, I thought them to be remote ballasts...
by robtdci
Sun Jul 08, 2012 11:06 pm
Forum: Lamps
Topic: Favourite Fluorescent Colours!
Replies: 19
Views: 5274

Re: Favourite Fluorescent Colours!

I prefer the warmer colours, I find the cool colours to be hard on my eyes. Currently using Osram Lumilux Interna 827 in my room. Does seem to be quite a personal thing though.
by robtdci
Sun Jul 08, 2012 10:15 pm
Forum: Street Lighting
Topic: Street Lighting Cut Backs
Replies: 19
Views: 5446

Re: Street Lighting Cut Backs

Hi Colin, Yes I do live in the Crosby area of Sefton. The fluorescent lanterns were older than the ones in your link with clouded bowls and refractor plates to the side, though some of these lanterns were replaced with the GEC model in your link. They became quite unreliable towards the end of their...
by robtdci
Sat Jul 07, 2012 12:05 am
Forum: Street Lighting
Topic: Street Lighting Cut Backs
Replies: 19
Views: 5446

Re: Street Lighting Cut Backs

My road was lit by 2 * 40w 2ft T12 lanterns until 1985, controlled by mechanical Sangamo time switches. These would extinguish at mid night except for a lamp at each end and in the middle. They were then replaced by 35w SOX on full night photocells. A few years ago, these along with the 5 metre colu...
by robtdci
Fri Jul 06, 2012 10:43 pm
Forum: Luminaires
Topic: Mood Lighting in Schools!
Replies: 14
Views: 6275

Re: Mood Lighting in Schools!

Hi Colin, Was the school you mention with the 300w filament lamps situated between Hugh Baird College and the Strand shopping centre if you don't mind me asking? I used to sometimes pass a school with clear 300w lamps in the classrooms in the early 90s when I was a Student at the college. P.S. - I r...