Kev
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I'm just wondering if anyone can help...I have some old Philips lamps one has a date code 0M this is the oldest one of the lot 2 others i have are slightly newer they the codes on these are 3C and 3E Some of my newer ones have 7J just wondering if anyone can explain how these codes work? thanks
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Lampwizard
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The Philips letter-digit and v.v. date coding format is as follows:
early 60s till December 1969, 1980s, 2000s: letter-digit format 1970s, 1990s, 2010s: digit-letter format
digit = last digit of the year. E.g. 4 = 1964, 1974, 1984 etc letter = month: A= January, B= February ... M=December. The letter I is excluded.
So 0M could be December 1970, December 1990. In your case of an old lamp, it's probably December 1970. 3C is March 1993 or 1973, 3E is May 1993 or 1973 and 7J is September 1997 or 1977.
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« Last Edit: September 21, 2010, 10:40:44 AM by Lampwizard »
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Philips colour 27: best fluorescent tube colour.
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Kev
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Ideal thanks for that. I would of thought by the lamp end caps being the design they are that the 0M lamp i have is more like december 1960 Thanks for your help anyway i will know this for future use!
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SuperSix
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Ah thanks for this, I knew how the date codes worked but not that letter I is excluded so I was confused why one of my tubes had M7 on it. 1960s design so must be December 1967
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Lampwizard
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I'm not sure when Philips adopted this production code format. The earliest examples I have seen date back to 1964. But maybe it was introduced already before that year?
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Philips colour 27: best fluorescent tube colour.
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James
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This sounds about right. The Philips specs which indicate the structure of the previous dot-dash system only disclose code combinations as far as December 1963, so by January 1964 the new system would have had to take over. However it is possible that the new system was also implemented in some factories before Jan 64.
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HID Man_250w
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Osram Optispec 90W SOX
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I have a light here I would appreciate is any one could tell me it has c1 which I believe is March 1991
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Matronblatzbarg
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I have two 135W Philips sox lamps whith the code 7H on. I can't find any date-information on the internet about them.
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Rommie
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See here. 7H is August 1977/1997/2017 - you will have to decide the decade based on the lamp design, if you think thay're very new or very old lamps.
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Matronblatzbarg
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I don't know anything about Sox lamp design. I got my very first Sox lamp last autumn. But I guess it is probably 2017.
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bulb_tester2009
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Resolutely crack down on inferior LED lighting!!
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I don't think this date code is applied to all Philips luminaires.For example, the date code of Philips LEDs is 4 digits, and there is no regularity. Philips HPI-T (conventional), including China, uses the date format of "Mfg:yyyy/mm/dd".
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I've been collecting light bulbs since I was 2 years old and I've been collecting them ever since. One of the few Chinese users here Note: Bulb base in China:E12(CES) E14(SES) B22d(BC) E27(ES) E40(GES)
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funkybulb
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Here in the US philip starts in 1980s format But from 1984 to 1987 will have tale tale sign Of philip westinghouse. Then philip etch And date code. Same for 1990s with digit Swap. Lamp started alto series in 1998 Carries onwards 2000 lamps will have letter E for EPACT compliance. 2010 time period Is dead giveaway with green endcaps And lamp started containing mercury Wording. Then 2020 philip undergoing Lamp plant closing process. July 15 2021 Ended long lamp production of HO here in the US. Now lamp production carries on in Poland And India with EU style endcaps on slimelines And there in process setting up the HO lines as Philip over produce the HO lamps here in the US. And T8 are from Poland. So that will give u better Clue how to Date US Philips lamps
In 1970s sox lamp in the US is norelco ones This lasted until philip bought out westinghouse Change to philips fallow EU date coding
US hid lamps philip-westinghouse till 1987 And most lamps in this perod is the westy BT Shape lamps. 1990s philips ED shape glass Came out this carries over unti bath plant lamp Closure 2008 all our hid lamps comng from Poland and China
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No LED gadgets, spins too slowly. Gotta love preheat and MV. let the lights keep my meter spinning.
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AngryHorse
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Rich, Coaster junkie!
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Here’s a question?, why did they even use codes??? What was up with just printing 15/07/64, or 07/15/64 for US lamps, why go to to all the bother of breaking dates up into codes?
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Rommie
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Could have been lack of space on the etch in the early days Or maybe it was just to confuse the masses, i.e. us
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funkybulb
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July 15 2021 Is when last American fluorescent produced Here in the US. And Exit the North Amarican Manufactureing The last Lamp they made for that day was HO 8 foot 110 watt Fluorescent. Whaf make a end period though years Of 1983 to july 2021 date codes date codes on American Philips fluorescent tubes. But this date code will carry on With poland and India tubes. This make a new start line For tubes comminng into the US. But we have older poland Lamps such as CFLs and EU Ts and some of there hid lamps.
So finding a August 2021 North American tubes not going to happen as there is no such tubes
Philip in the US bought out few lamps plant in the late 1960s or 70s time time frame such as Itt and Champion lamp plant. But there was bit of a problem philip could not Use there own name Because it would create confusion with Philco radio. So philip Had to rename the company under North American electric lamp company So they took all that wording Nor as in north and E as electric L as in lamp and CO company and that how Norelco got it name. Until 1982 Philip bought out Philco radio. And then They bought westinghouse Lamp Division in 1983. So any philip lamps that were made in the US Before philips was sold under norelco and yes that included sox lamps for US market. So it bit easier dating US philips lamps because there lot of changes in manufactureing in each of it decades. That what I am pointing out to.
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« Last Edit: May 24, 2022, 12:56:48 PM by funkybulb »
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No LED gadgets, spins too slowly. Gotta love preheat and MV. let the lights keep my meter spinning.
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