Search found 332 matches

by Tom
Wed Oct 04, 2017 6:03 pm
Forum: Control Gear
Topic: Correct Capacitor List
Replies: 15
Views: 3265

Re: Correct Capacitor List

I do find it quite interesting the huge contrasts in different capacitor ratings between lamps, even of the same wattage. We have 13-18uf caps for 250w mercury circuits yet the 250w SON needs 30uF! Old catalogues from the 50s, for say, a 4ft 40w switchstart circuit list a 3.25uF cap yet an 18" ...
by Tom
Sat Aug 12, 2017 6:11 pm
Forum: Lamps
Topic: Philips "gearless" tungsten ballasted fluorescents
Replies: 7
Views: 425

Re: Philips "gearless" tungsten ballasted fluorescents

The Philips 1953 catalogue over on the gallery has details on MCFB/U self starting tubes! Very interesting section! The lamps had a recessed single contact cap, although the long pin TL-X tubes will still work with your lamp.
by Tom
Fri Jul 21, 2017 9:19 am
Forum: Lamps
Topic: Coloured Metal Halide Lamps
Replies: 8
Views: 696

Re: Coloured Metal Halide Lamps

I know exactly what you mean about installation designs that initially spec'd coloured halides. There's a posh estate agents down my way that had magenta lamps lighting the front of their building that looked funky by night. Now they're just regular lamps! Coloured lamps never seem to get replaced l...
by Tom
Tue Jul 18, 2017 2:45 pm
Forum: Lamps
Topic: Coloured Metal Halide Lamps
Replies: 8
Views: 696

Re: Coloured Metal Halide Lamps

What I find quite amazing is the fact that coloured metal halide lamps came about as a result of early developments where rapid depreciation of elements such as Lithium, leaving a predominant dose of Thallium or Indium behind, resulting in the distinct green or blue light. I believe GEC were one of ...
by Tom
Wed Apr 26, 2017 11:18 am
Forum: Lamps
Topic: Short Lived Oven Lamps!
Replies: 1
Views: 334

Short Lived Oven Lamps!

Has anyone else been experiencing premature lamp failures in their ovens at home? I'm referring to the 300c rated 40w E14 G45 jobs. We've had both Polish made Philips and Chinese made Osram pearl variants and never get more than a few months service from them! All the lamps I've seen have the standa...
by Tom
Mon Feb 20, 2017 11:25 pm
Forum: Lamps
Topic: Narva Quits The Fluorescent Market
Replies: 6
Views: 942

Re: Narva Quits The Fluorescent Market

Heartbreaking stuff. They're trying their best to get fluorescent confided to the history books by the look of things! As far as Chinese lamps go, BELL are the way forward!
by Tom
Tue Feb 14, 2017 9:54 pm
Forum: Lamps
Topic: Narva Quits The Fluorescent Market
Replies: 6
Views: 942

Re: Narva Quits The Fluorescent Market

Oh man this is NOT good news!! Just when it looked like quality tubes would stick around for a little while yet! Our only hope now is Philips keeping their production coming from Poland but that's not sounding too good either as Philips have been making noises about exiting the fluorescent market fo...
by Tom
Thu Nov 17, 2016 5:29 pm
Forum: Luminaires
Topic: Thorn Popular Pack c1970s
Replies: 20
Views: 4483

Re: Thorn Popular Pack c1970s

Totally agreed! Welcome to ATL Brite Spark! Strange to think we all thought we were alone in this great hobby and interest only we would understand! What's even more strange to think about, is the fact the T12 PP design is approaching fifty years old! It was around 1967-68 I think the first incarnat...
by Tom
Sat Oct 08, 2016 5:30 pm
Forum: Lamps
Topic: Osram 125w HQL Super Deluxe 'Golden Eggs' On Amazon
Replies: 1
Views: 922

Osram 125w HQL Super Deluxe 'Golden Eggs' On Amazon

As brought to our attention by Andy over on the gallery, a fantastic opportunity to own 125w editions of the famous MBF Super Deluxe lamps with the golden filter coat. The hallowed 'Golden Egg'! 80w and 50w versions also available. Can be found by searching Osram HQL on Amazon. There's even a 250w a...
by Tom
Fri Sep 23, 2016 4:27 pm
Forum: Lamps
Topic: The Philips CorePro LED PLC Lamp
Replies: 5
Views: 1000

Re: The Philips CorePro LED PLC Lamp

It's kind of sad that Philips have designed an LED replacement for the very lamps they invented! But on the other hand, all credit to Philips for developing lamps that are compatible with existing gear including HF and emergency without modification! That would've taken some pretty serious circuitry...
by Tom
Wed Aug 10, 2016 6:29 pm
Forum: Street Lighting
Topic: Interested In Light Pollution?
Replies: 2
Views: 1350

Re: Interested In Light Pollution?

Will be interesting to see the map in a few years when LED has taken over....
by Tom
Fri Jul 15, 2016 3:12 pm
Forum: Lamps
Topic: Help Identifying Lamps
Replies: 9
Views: 1068

Re: Help Identifying Lamps

Appears to be the 25w Rough Service (reinforced filament construction) version too. Good find! Often used as a 'headlight' in upright vacuum cleaners of the 60s and 70s. I Once had a Hoover branded GEC 25w SBC pygmy!
by Tom
Tue Jun 07, 2016 8:58 pm
Forum: Luminaires
Topic: Superslim Lampholders
Replies: 8
Views: 1262

Re: Superslim Lampholders

Sounds a good plan!
by Tom
Sun Jun 05, 2016 6:05 pm
Forum: Luminaires
Topic: Superslim Lampholders
Replies: 8
Views: 1262

Re: Superslim Lampholders

They're made of hard urea/Bakelite type plastic so should be fairly immune to stripping methods. I'd try steaming them too!
by Tom
Wed Mar 09, 2016 9:32 pm
Forum: Street Lighting
Topic: Thorn Beta 6 Bowls
Replies: 3
Views: 1079

Re: Thorn Beta 6 Bowls

Would the bowl from the Australian Stradalux fit? May be worth contacting the guys downunder? Sadly I'm not lucky enough to own a Beta 6 either, let alone a bowl!
by Tom
Thu Feb 18, 2016 11:13 pm
Forum: Control Gear
Topic: EOL Tubes On Thermal Starters?
Replies: 3
Views: 1901

EOL Tubes On Thermal Starters?

Has anyone ever witnessed a tube failing on a thermal 4 pin switchstart circuit? I'm just curious to whether the rectifying lamp would still pass enough current to keep the heater coil and contacts open, allowing the tube to shimmer away. Or would the rectifying tube cause the starter to cool down r...
by Tom
Sun Feb 07, 2016 3:42 pm
Forum: Street Lighting
Topic: 70s Street lighting Vid
Replies: 6
Views: 1373

Re: 70s Street lighting Vid

Great bit of footage! Loved seeing all the old streetlights and vehicles! Note the distinct lack of pedal cyclists.... Back when people had sense! Come another 45 years there'll be no shortage of dash cam and Go-pro footage of London and we'll all look back on just how stupid some cyclists were! But...
by Tom
Thu Feb 04, 2016 1:00 am
Forum: Lamps
Topic: Does anyone use indandescent GLS anymore?
Replies: 13
Views: 2017

Re: Does anyone use indandescent GLS anymore?

Only GLS we have here is a BC 100w Crown Silver in the spare room....
by Tom
Tue Jan 19, 2016 2:46 pm
Forum: Lamps
Topic: Kino-Flo T12 Tubes Our 8' Prayers Answered?
Replies: 3
Views: 837

Kino-Flo T12 Tubes Our 8' Prayers Answered?

Having seen one on the gallery a few weeks ago, I thought I'd check these studio lighting specialists out! Although American, they sell worldwide and have a UK dealer. Some very nice looking G13 T12s including 2' 40w and 8' 120w which apparently is compatible with 125! They even do 6w and 8w T5s! Th...
by Tom
Mon Jan 11, 2016 9:45 pm
Forum: Lamps
Topic: The New Super Effecient Incandescent?
Replies: 3
Views: 1198

The New Super Effecient Incandescent?

I'm not sure how big a pinch of salt is needed here but this is an interesting read from the Telegraph: http://www.telegraph.co.uk/news/science/science-news/12093545/Return-of-incandescent-light-bulbs-as-MIT-makes-them-more-efficient-than-LEDs.html?utm_medium=Social&utm_source=Facebook&utm_c...
by Tom
Wed Dec 30, 2015 5:00 pm
Forum: Lamps
Topic: 85w SO/H Gear?
Replies: 2
Views: 738

Re: 85w SO/H Gear?

You lucky man! SO/H is still very much on my most wanted list. As far as I'm aware, 55w SOX was intended to replace the 85w SO/H (which shared the same leak transformer ballast as the 45w and 60w I believe) so a 55w circuit should be ok. Don't forget to let her run for a good six plus hours!
by Tom
Tue Dec 22, 2015 4:43 pm
Forum: Lamps
Topic: T4?
Replies: 4
Views: 1056

Re: T4?

Surely you must have seen one of those plastic Eterna T4 fittings by now!? T4 has been around since the early 2000s and there is no standardisation with sizes. Each manufacturer have their own length give or take a centimetre or so difference between makes of the same wattage lamp!
by Tom
Sat Nov 21, 2015 4:31 pm
Forum: Lamps
Topic: LED Replacement for PLs
Replies: 5
Views: 1033

Re: LED Replacement for PLs

There is no way that would hold out in an oven! Apart from that, I quite like it as an LED filament pygmy and I'm sure we'll see branded versions here soon. But as far as LED PLs are concerned, keep it fluorescent! Maybe one day we'll see them made to proper tube shapes but I still can't see that be...
by Tom
Fri Nov 20, 2015 11:52 pm
Forum: Lamps
Topic: LED Replacement for PLs
Replies: 5
Views: 1033

Re: LED Replacement for PLs

What is even more laughable is they have to provide separate horizontal and vertical versions which make no use of the luminaire optics whatsoever! Granted LED is now bloody fantastic as a GU10 and even MR16 halogen replacement and I for one am quite fond of the LED filaments we now have. But fluore...
by Tom
Fri Nov 20, 2015 4:30 pm
Forum: Lamps
Topic: LED Replacement for PLs
Replies: 5
Views: 1033

Re: LED Replacement for PLs

The very few I've seen look pretty awful. Dreadful things!

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