Humey Posted October 20, 2010 Share Posted October 20, 2010 my knowledge of lighting is limited when it comes to the lamp side of things so I thought I would check before I go through with anything.. The lantern collection where I am is made up of a lot of patt 23's and patt 123's, a few patt 743's and patt 263/264s. I am looking at getting them all with working lamps (they have been neglected for many years). The problem is the previous technicians lamp cupboard it full of random lamps, some working, some not and seem to be all mainly T18 1000w. My question is, how improtant is it to follow the 'T' number when buying/replacing lamps. Also, what does the 'T' mean? Any help would be appreciatted Link to comment Share on other sites More sharing options...
Robin D Posted October 20, 2010 Share Posted October 20, 2010 The Blue-room Wiki is your friend. Link to comment Share on other sites More sharing options...
Humey Posted October 20, 2010 Author Share Posted October 20, 2010 The Blue-room Wiki is your friend. I did actually check the Wiki but obviously not thoroughly enough! So the T rating relates to output and temperature?? Link to comment Share on other sites More sharing options...
musht Posted October 20, 2010 Share Posted October 20, 2010 So the T rating relates to output and temperature?? T is Theatre Calss lamps, around 3200K and usually dont need fan cooling. Some lamps may have an M variant, M for Display (!? Thats ANSI for you) which may have a different colour tempertaure, usually longer life span against lower lumen output tradeoff. Link to comment Share on other sites More sharing options...
jonathanhill Posted October 20, 2010 Share Posted October 20, 2010 around 3200KMore like 3050K, CP lamps are at 3200K. Link to comment Share on other sites More sharing options...
Solitaire Posted October 20, 2010 Share Posted October 20, 2010 Class T - Theatre Spotlight Type - was originally a compromise between a Class A.1 - high output, short life, minimum tilt angle and Class B.1 - lower output, longer life, larger tilt angle. There was also a Class S - Cinema Studio Type Link to comment Share on other sites More sharing options...
boatman Posted October 20, 2010 Share Posted October 20, 2010 Sparks Theatrical Hire used to have a very handy reference on their old website, but it's not on their new one. Luckily it can also be found here. Link to comment Share on other sites More sharing options...
musht Posted October 20, 2010 Share Posted October 20, 2010 around 3200KMore like 3050K, CP lamps are at 3200K. Thankyou for the correction :-) CP stands for Colour Photography Link to comment Share on other sites More sharing options...
jonathanhill Posted October 20, 2010 Share Posted October 20, 2010 CP stands for Colour PhotographyIndeed, they were developed for tungsten balanced film stock. Link to comment Share on other sites More sharing options...
gareth Posted October 20, 2010 Share Posted October 20, 2010 how improtant is it to follow the 'T' number when buying/replacing lampsVery important. Apart from the T deonting a theatre-class lamp, the number identifies a particular configuration of lamp - pin centres, pin dimensions, wattage, filament height, filament configuration, etc. You need to put the right lamp into the right lantern. Your Patt.23s and 123s need a T17 or T24 ; Patt.743s need a T11 or T19 ; and the Patt.263s and 264s need a T15. Link to comment Share on other sites More sharing options...
Humey Posted October 21, 2010 Author Share Posted October 21, 2010 how improtant is it to follow the 'T' number when buying/replacing lampsVery important. Apart from the T deonting a theatre-class lamp, the number identifies a particular configuration of lamp - pin centres, pin dimensions, wattage, filament height, filament configuration, etc. You need to put the right lamp into the right lantern. Your Patt.23s and 123s need a T17 or T24 ; Patt.743s need a T11 or T19 ; and the Patt.263s and 264s need a T15. The Sparks Reference Guide shows that patt 123 take t18 or t26? Link to comment Share on other sites More sharing options...
andy_s Posted October 21, 2010 Share Posted October 21, 2010 The T17 was a P28s cap, and fits the original unmodified lanterns; lots of patt 23s and 123s were fitted with a lampholder upgrade kit to allow them to take a T18 with a GY9.5 cap. as regards upgrading to 650W (T26), I don't know that this was much done, but I haven't used these types for a very long time, I guess establishments still using them might see the benefit of a higher wattage version, not least if the venue also has stocks of lanterns such as CCT Minuettes or Selecon Acclaims, as it reduces the types of lamps you need to stock. Link to comment Share on other sites More sharing options...
jonathanhill Posted October 21, 2010 Share Posted October 21, 2010 The Sparks Reference Guide shows that patt 123 take t18 or t26?It will depend on what lamp holder is fitted to the lanterns. The older Patt. 23 and 123 units were fitted with a P28s lampholder (T1/T17/T24/T28). I believe that a retro-fit kit to upgrade to a GY9.5 lampholder was available (T17/T18/T25/T28). Use the Blue Room wiki (link posted in an earlier post) to compare lamp types. The various lamps will all have differing output, colour temperature, rated life and base. Link to comment Share on other sites More sharing options...
gareth Posted October 21, 2010 Share Posted October 21, 2010 The Sparks Reference Guide shows that patt 123 take t18 or t26?Only if they've been modified to take these lamps. If not (most haven't), my advice stands. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.