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Christopher Borcsok
Senior Member
Username: ckb

Post Number: 22
Registered: 06-2013
Posted on Tuesday, January 07, 2014 - 12:48 am:   Edit PostDelete PostPrint Post

I'm trying to figure out a nice way to break down my specification sections for lighting to provide a little more detail, and to standardize some things in my office.

Officially, MasterFormat lists 28 sections in 26 5x xx, arbitrarily dividing the lighting, some by technical selection criteria (for example the lamps and ballasts section), or by rough application (interior, exterior, etc...):

26 50 00 Lighting
26 51 00 Interior Lighting
26 51 13 Interior Lighting Fixtures, Lamps, And Ballasts
26 52 00 Emergency Lighting
26 53 00 Exit Signs
26 54 00 Classified Location Lighting
26 55 00 Special Purpose Lighting
26 55 23 Outline Lighting
26 55 29 Underwater Lighting
26 55 33 Hazard Warning Lighting
26 55 36 Obstruction Lighting
26 55 39 Helipad Lighting
26 55 53 Security Lighting
26 55 59 Display Lighting
26 55 61 Theatrical Lighting
26 55 63 Detention Lighting
26 55 70 Healthcare Lighting
26 55 83 Broadcast Lighting
26 56 00 Exterior Lighting
26 56 13 Lighting Poles and Standards
26 56 16 Parking Lighting
26 56 19 Roadway Lighting
26 56 23 Area Lighting
26 56 26 Landscape Lighting
26 56 29 Site Lighting
26 56 33 Walkway Lighting
26 56 36 Flood Lighting
26 56 68 Exterior Athletic Lighting

Having looked around, I encountered the following (user defined) numbers and titles:

26 51 40 - Fluorescent Lighting
26 51 50 - Commercial Chandeliers
26 51 60 - Halogen and Low-voltage Lighting
26 51 70 - Neon, Cold-cathode and Remote-source Lighting
26 51 75 - Interior Athletic Lighting
26 51 80 - Residential-style Interior Lighting
26 56 10 - Exterior Lighting (per above, MF 2004 uses 26 56 00)
26 56 20 - Lighting Poles, Standards and Bases (per above, MF 2004 uses 26 56 13)
26 56 26 - Lighting Base Piers
26 56 30 - Landscape Lighting (26 56 26)
26 56 40 - Gas Lighting - should be Section 10 84 00/13.
26 56 60 - Exterior Athletic Lighting (26 56 68)
26 56 70 - Solar-Powered Exterior Lighting
26 56 80 - Residential-style Exterior Lighting
26 58 00 - Lighting Accessories (based on the 4specs description "bulbs and specialties", contradicts somewhat with 26 51 13, MF transition guide maps 16580 (appropriate MF 1995 number) to 26 50 00.
26 59 00 - Lighting Reproduction, Restoration and Repair (sounds like a legacy MF 1995 number), MF transition guide maps this to 26 01 50.

26 51 15: Electronic Ballasts
26 51 16: LED Replacement Lamps
26 51 17: Fluorescent Lamps
26 51 20: Induction Lamps


26 50 13 Fluorescent Luminaire Disconnects
26 56 19.11 Roadway Lighting: Wiring Connections

So, my questions:
1. (if anyone knows?) where (method or madness) were the 4specs (user defined) numbers derived from? The interior lighting sections appear based on fixture type, whereas the spec sections for exterior are based on application.
2. What's the process for submitting (or proposing) revised section numbers to Colin who runs this site?
3. What makes sense to better break this down? I'm thinking of doing a level 4 section by lighting source; perhaps something of children to a "Common Work Results for Lighting" Section

26 50 05.13 - Luminaire Disconnects
26 50 05.23 - Filament Lamps
26 50 05.33 - (Linear) Fluorescent Lamps
26 50 05.34 - Pin-based Compact Fluorescent Lamps
26 50 05.36 - Fluorescent Ballasts
26 50 05.39 - Screw Based Compact Fluorescent Lamps
26 50 05.33 - Metal Halide Lamps
26 50 05.36 - Metal Halide Ballasts
26 50 05.43 - High Pressure Sodium Lamps
26 50 05.53 - Light Emitting Diode Sources and Drivers
26 50 05.59 - Light Emitting Diode Retrofit Lamps

Thoughts? Feedback?
Senior Member
Username: tsugaguy

Post Number: 317
Registered: 06-2005

Posted on Tuesday, January 07, 2014 - 07:50 am:   Edit PostDelete PostPrint Post

For the rationale used by Arcom and the MasterSpec Engineering Review Committee when they studied out this subject, see the current edition of SpecPress at www.specpress.org, "In a Different Light: MasterSpec Updates Provide New, More Detailed Lighting Sections".
Michael Heinsdorf
New member
Username: michael_heinsdorf_pe

Post Number: 1
Registered: 01-2014
Posted on Tuesday, January 07, 2014 - 12:04 pm:   Edit PostDelete PostPrint Post

There are a couple things that were not mentioned in the article.

It took quite a while to agree upon those sections, and like anything, the breakdown won't be ideal for all applications. The intent is as LED takes over we'll withdraw the other sections, or edit as appropriate.

We also worked with a couple lighting designers who liked the idea of splitting up by technology. Splitting out by use, base, or other physical characteristic was a lot of work, and it would be very difficult to anticipate every need or use.
And the lighting industry is changing so quickly that broader is better. For instance, we chose not to write a retrofit specification for several reasons: six months ago, none of the LED retrofit kits for a T8 fluorescent had light that met the same level or distribution as a T8 tube (I'm assured that work properly now). Also, most jobs doing retrofits aren't going to use specifications. If they do, it's cheaper to replace the entire luminaire. In most cases, there is no retrofit for an existing luminaire because LED is a point light source and every other lighting technology is not.

Each section will specify the luminaire (fixture), lamp, and ballast (if applicable). Breaking out lamps and ballasts creates more work for the writer (one of our goals is to minimize the work and potential for error by the writer).

The sections that are very specialized, such as theatrical or roadway lighting will remain as separate sections.

If I had to do it again, I would have considered induction lighting. On a lumens per dollar scale, it is cheap to buy and operate. But I don't see it being too long before LED bests induction on both.

Luminaire disconnects - I assume you mean switches? I would not suggest using that term. A disconnect switch in the electrical world is an isolation switch that disconnects the circuit for service, not for use. 260923 - Lighting Control Devices would be better. If you bring LEED into the equation, then consider a lighting control panelboard or dimming controls specification as well. Here is what I would consider the lighting lineup (these are currently available sections in MasterSpec):

260923: Lighting Control Devices
260933: Central Dimming Controls
260936.19: Standalone Multipreset Modular Dimming Controls
260943.16: Addressable Fixture Lighting Controls
265113: Incandescent Interior Lighting
265116: Fluorescent Interior Lighting
265119: LED Interior Lighting
265123: HID Interior Lighting
265219: Emergency and Exit Lighting
265561: Theatrical Lighting
265613: Lighting Poles and Standards
265617: Fluorescent Exterior Lighting
265619: LED Exterior Lighting
265621: HID Exterior Lighting
265668: Exterior Athletic Lighting
Christopher Borcsok (Unregistered Guest)
Unregistered guest
Posted on Tuesday, January 07, 2014 - 01:44 pm:   Edit PostDelete PostPrint Post

Great article explaining the method that MasterSpec uses. I like the approach as a starting point, and the explanation. However, it seems that MasterSpec does conflict with the rules of CSI/CSC with regards to use of assigned numbers. In this case I could assign a level 4 number to the MasterSpec numbers for lamps and ballasts, respectively, to suit what I am trying to do.

The thought in my head was that the lamps and ballasts are a common work result of lighting, independent of whether they are interior or exterior, since I have encountered LED, Fluorescent, and Metal Halide in both interior and exterior applications.

Michael, note the typo for correction in the specpress article: "Section 265123 "HID Exterior Lighting" should be *Interior*

re: Luminaire disconnects, a better description is is "Luminaire Disconnect Plugs", see this catalog sheet for one example: http://www.idealindustries.ca/media/pdfs/products/brochures/p-2733_powerplug_brochure.pdf. Generally, they are required by code for all new 277 and 347 volt light fixtures in the US and Canada (recent change in the US); new fixtures should have them by code, though I'm currently working on a retrofit project where the Owner explicitly asked for them to be added to existing 120 volt fixtures (ease of maintenance, safety). They are specifically a lighting component, and are not a control device, so 26 09 xx wouldn't be the right place to categorize them. Aside from retrofits, they are an integral component to a luminaire.

Regarding LED tube retrofits for T8 lamps, I'd stay away from them. I've encountered code issues due to the voltage rating of sockets, the labelling requirements due to the removal of ballasts etc., and the horror story of someone putting a T8 lamp back in after the LED retrofit was installed. Also, they suffer in performance in many fixture types, since the fixtures are designed with a reflector to direct the omnidirectional light output of a T8 lamp. The LED tubs are unidirectional, and the lack of uplight from the "lamp" causes striping, and the lamp is not matched to the optical performance of the fixture. See http://apps1.eere.energy.gov/buildings/publications/pdfs/ssl/led_watch_02-04-13.pdf.

I've written one lighting retrofit section (26 01 50.81) to date, but it was more associated with the specifics of the retrofit process as related to Part 3 - Execution (measurement, disposal, recycling, incentives applications by the contractor), which I deferred to Section 26 50 00 to address the new products and their installation.
Michael Heinsdorf, P.E.
Junior Member
Username: michael_heinsdorf_pe

Post Number: 2
Registered: 01-2014
Posted on Tuesday, January 07, 2014 - 03:02 pm:   Edit PostDelete PostPrint Post

There are a couple places where MasterSpec deviates from the CSI/CSC rules. In this case, it was because MasterFormat grouped lights by use. Had we kept to that scheme, we would have had to decide what type of technology to include with each type of lighting and would have had limited ways to keep the specification current. E.g. 265400 - Classified Lighting, had limited to no approved LED luminaires when we first started this project. Now there are several available.

Another issue is lighting products that are relatively new. LED rope lighting - is it Interior Lighting? Display Lighting? Emergency Lighting? Outline Lighting? Walkway Lighting? Establishing and anticipating every use of lighting and new products is a task we did not want to try.

There are a couple typos in that article I'm going to have them fix - looks like there is a standard instead of specification in another place.

Those luminaire disconnects are only required for double ended fluorescent luminaires in the US, with a couple of exceptions. For specs used in the US, it may be a good idea to include that in the fluorescent specification only (and we didn't, thank you for pointing out the product).

The tubes are a stopgap measure. I have a couple samples in the office and after installing them, decided not to bother writing a specification section about them. A panel doesn't cost that much more, provides better light, and is less time to install.

For the measurement, disposal, recycling, and incentives, for a larger project, you may want to check out the front end. Most of those issues are addressed, with specific LEED, GreenGlobes, etc. requirements in a Construction Waste specification.
Christopher Borcsok
Senior Member
Username: ckb

Post Number: 23
Registered: 06-2013
Posted on Wednesday, January 08, 2014 - 12:00 am:   Edit PostDelete PostPrint Post

In my case the utility incentives are conditional on receipt of proof of recycling though the Recycling Council of Ontario's "Take Back the Light" program, and it's specific to the lighting products (fixtures, lamps, ballasts), so in my case the lighting replacement section made more sense.

I agree with you that the tubes are a stopgap measure; however I don't see the E26 base LED retrofit lamps disappearing from the market anytime soon, especially for PAR lamps, or MR16 form factors (looking at one scenario where a PAR38 LED is the only practical retrofit option with existing incandescent pot lights, cylinders, etc.
Christopher Borcsok
Senior Member
Username: ckb

Post Number: 24
Registered: 06-2013
Posted on Wednesday, January 08, 2014 - 10:35 pm:   Edit PostDelete PostPrint Post

While on the topic of lighting, I'm trying to figure out the best way to specify a concrete base for an exterior lighting pole.

The form/sonotube falls under 03 11 13 or 03 11 16, depending on whether I'm doing a plain cylindrical base or an architectural form, but the work result is obviously electrical.

Thinking of spec'ing the form in 26 56 13, but making reference to procedures in 03 11 00. Is this the right/ideal approach?
J. Peter Jordan
Senior Member
Username: jpjordan

Post Number: 664
Registered: 05-2004
Posted on Thursday, January 09, 2014 - 07:46 am:   Edit PostDelete PostPrint Post

These are usually designed by a structural engineer and since they are usually constructed of cast-in-place they would automatically be included in those sections. I would not generate a separate section.
Michael Heinsdorf, P.E.
Advanced Member
Username: michael_heinsdorf_pe

Post Number: 5
Registered: 01-2014
Posted on Thursday, January 09, 2014 - 04:22 pm:   Edit PostDelete PostPrint Post

Think about who is going to be doing the work for the cast-in-place base. While the electrician may set the conduit in place, he or she is likely not going to set the reinforcement, form, anchor bolts, or place the concrete. There are also a lot of very strict requirements for placing structural concrete that would not be adequately addressed in a lighting section.

In Poles and Standards and the old Exterior Lighting section, MasterSpec contains requirements for the anchor bolts and some basic language for size and dimension, with a reference to the Cast-in-Place Concrete. This correlates with the electrical drawings, which typically show the pole, electrical connections, and anchor bolts on the electrical drawings, with a reference to the structural drawings, where the actual base is shown.

If you are doing a pretty small project, it is possible that you could show the light pole and the base, including reinforcement, anchor bolts, etc. on the electrical drawings. But to get the proper work result for the concrete, the Cast-in-Place Concrete section needs to be included. The Cast-in-Place section can also be used for a pre-cast concrete base.

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