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> FOCUS CALIFORNIA’S TITLE 24 UPDATE
TABLE 150.0-B Minimum Requirements for Other Light Sources to Qualify as High Efficacy
Use this table to determine luminaire efficacy only for lighting systems not listed in table 150.0-A
Luminaire Power Rating Minimum Luminaire Efficacy to Qualify as High Efficacy
5 watts or less 30 lumens per watt
over 5 watts to 15 watts 45 lumens per watt
over 15 watts to 40 watts 60 lumens per watt
over 40 watts 90 lumens per watt
Note: Determine minimum luminaire efficacy using the system initial rated lumens divided by the luminaire total rated system input power.
With all of this as background, it
would be fair to wonder if California
hasn’t already done enough. In other
words, why tighten the standards any
Mazi Shirakh is the senior mechanical engineer and project manager for
Building Energy Efficiency Standards for
the CEC. Given his position, he is understandably prejudiced about the need for,
and the ability of, the new standards to
achieve even greater reductions of electricity consumption.
To put things into perspective, Shirakh said the 2013 standards will result
in a whopping 80 percent reduction in
energy use from 1978 levels when the
first set of standards were adopted. He
explained that the goal of the updated
standards is to make the building envelope and lighting equipment as efficient
as possible, and he said that the changes
will result in a net benefit to the owner.
So what provisions in the 2013 update
will most affect the EC? Not surprisingly, most of the relevant changes apply
to lighting. That is where efficiency
standards can have some of their biggest
effects in the home and still be moderately inconspicuous.
“Fifty percent of the watts in a home’s
lighting must come from high efficacy
sources,” Shirakh said. “High and low efficacy sources must be on different circuits.”
What is considered a high efficacy
source? Jeff Pollock is the owner and
manager of Technologic Energy Consulting, located in Valencia, Calif., as
well as the 2014 chairman of the board of
directors for the California Association
of Building Energy Consultants. He said
that the lighting-efficacy requirements
have been simplified since the last update
in 2008, and he said that luminaire type
The new regulations provide two
tables to help designers and installers determine what kind of lighting is
considered high or low efficacy. Table
150.0-A defines high and low efficacy
light sources by type. By looking at the
lumens per watt (LPW) ratio, Table
150.0-B determines the efficiency of any
light source that Table A does not list.
In short, fixtures that Table A considers high efficacy are designed for
compact fluorescent lamps (CFLs), light-emitting diodes (LEDs) and certain types
of other lamps, such as pulse-start metal
halide lamps and high-pressure sodium
lamps. Fixtures that Table A considers
low efficacy are designed for inefficient
lamps, such as incandescent, and high
efficiency lamps (CFL and LED) with
screw bases. The table notes that
adapters that convert an incandescent
lampholder to a high-efficiency luminaire are not considered high efficacy.
As an example from Table B, a lumi-
naire with a rating of 5 watts (W) or less
must provide at least 30 LPW to be con-
sidered high efficacy. A luminaire that is
rated for greater than 40W must provide
90 LPW to be considered high efficacy.
Aside from lamp type, the updated
standards also impose requirements for
different rooms. This is another area
where the CEC has demonstrated its
understanding of methods to finesse
behavior modification for more efficient
use of electricity.
The new standards require at least
one high efficacy light source in every
room of the house, but they also allow
for what Shirakh calls “off-ramps.”
These alternatives enable designers to
reach efficiency goals while still making
allowances for personal preferences in
TABLE 150.0-A Classification of High Efficacy and Low Efficacy Light Sources
High Efficacy Light Sources
Luminaires manufactured, designed and rated for use
with only lighting technologies in this column shall be
classified as high efficacy:
1. Pin-based linear or compact fluorescent lamps with
electronic ballasts. Compact fluorescent lamps ≥
13 watts shall have 4 pins for compliance with the
electronic ballast requirements in Section 150.0(k)1D.
2. Pulse-start metal halide lamps.
3. High-pressure sodium lamps.
4. GU- 24 sockets rated for LED lamps.
5. vGU- 24 sockets rated for compact fluorescent lamps.
6. Luminaires using LED light sources which have
been certified to the Commission as high efficacy in
accordance with Reference Joint Appendix JA8.
7. Luminaire housings rated by the manufacturer for
use with only LED ligh engines.
8. Induction lamps.
Note: Adaptors which convert an incandescent
lamp holder to a high efficacy luminaire shall
not be used to classify a luminaire as high
Low Efficacy Light Sources
Luminaires manufactured, designed or rated for use with
any of the lighting technologies in this column shall be
classified as low efficacy.
1. Line-voltage lamp holders (sockets) capable of
operating incandescent lamps of any type.
2. Low-voltage lamp holders capable of operating
incandescent lamps of any type.
3. High efficacy lamps installed in low efficacy
luminaires, including screw base compact fluorescent
and screw base LED lamps.
4. Mercury vapor lamps.
5. Track lighting or other flexible lighting system which
allows the addition or relocation of luminaires without
altering the wiring of the system.
6. Luminaires using LED light sources which have not
been certified to the Commission as high efficacy.
7. Lighting systems that have modular components
that allow conversion bet ween high efficacy and low
efficacy lighting without changing the luminaires’
housing or wiring.
8. Electrical boxes finished with a blank cover or where
no electrical equipment has been installed, and where
the electrical box can be used for a luminaire or a
surface-mounted ceiling fan.