(a) The following definitions refer to federally exempt linear fluorescent lamps:

1. (1) Federally exempt fluorescent lamp means linear lamps excluded from the definition of general service fluorescent lamps in 10 CFR section 430.32(n), as incorporated by reference in section 509.61 of this Part. Federally exempt fluorescent lamps include high CRI linear fluorescent lamps, impact resistant linear lamps, cold temperature linear lamps and less than 4-foot linear fluorescent lamps.

2. (2) Cold temperature fluorescent lamp means a fluorescent lamp that is not a compact fluorescent lamp that:

   1. (i) is specifically designed to start at -20°F when used with a ballast conforming to the requirements of ANSI C78.81 and ANSI C78.901, as incorporated by reference in section 509.61 of this Part; and
   2. (ii) is expressly designated as a cold temperature lamp both in markings on the lamp and in marketing materials, including catalogs, sales literature, and promotional material.
3. (3) High color rendering index (CRI) fluorescent lamp means a fluorescent lamp with a color rendering index of 87 or greater that is not a compact fluorescent lamp.

4. (4) Impact-resistant fluorescent lamp means a fluorescent lamp that is not a compact fluorescent lamp that:

   1. (i) has a coating or equivalent technology that is compliant with NSF/ANSI 51 and is designed to contain the glass if the glass envelope of the lamp is broken; and

   2. (ii) is designated and marketed for the intended application, with:

      1. (a) the designation on the lamp packaging; and

      2. (b) marketing materials that identify the lamp as being impact-resistant, shatter-resistant, shatterproof, or shatter-protected.

         (b) Standard requirements for federally exempt linear fluorescent lamps.

5. (1) High CRI, cold temperature, and impact-resistant fluorescent lamps shall meet the minimum efficacy requirements contained in 10 CFR section 430.32(n)(4), as incorporated by reference in section 509.61 of this Part.

6. (2) Each of the following general service fluorescent lamps manufactured on or after January 26, 2018, shall meet or exceed the following lamp efficacy standards shown in the table:

   Lamp Type	Correlated color temperature	Min. Average lamp efficacy (lm/W)
   4-foot medium bipin	≤4,500K >4,500k and ≤7,000K	92.4 88.7
   2-foot U-shaped	≤4,500K >4,500k and ≤7,000K	85.0 83.3
   8-foot slimline	≤4,500K >4,500k and ≤7,000K	97.0 93.0
   8-foot high output	≤4,500K >4,500k and ≤7,000K	92.0 88.0
   4-foot miniature bipin standard output	≤4,500K >4,500k and ≤7,000K	95.0 89.3
   4-foot miniature bipin high output	≤4,500K >4,500k and ≤7,000K	82.7 76.9

   (c) Test procedures for assuring compliance with the standards established in subdivision (b) of this section.

7. (1) The measurement procedure shall be as described in IES LM-9, except that lamps shall be operated at the appropriate voltage and current conditions as described in ANSI C78.375, and in ANSI C78.81, as incorporated by reference in section 509.61 of this Part, or ANSI C78.901, as incorporated by reference in section 509.61 of this Part, and lamps shall be operated using the appropriate reference ballast at input voltage specified by the reference circuit as described in ANSI C82.3. If, for a lamp, both low-frequency and high-frequency reference ballast settings are included in ANSI C78.81, as incorporated by reference in section 509.61 of this Part or ANSI C78.901, as incorporated by reference in section 509.61 of this Part, the lamp shall be operated using the low-frequency reference ballast.

8. (2) For lamps not listed in ANSI C78.81 nor in ANSI C78.901, the lamp shall be operated using the following reference ballast settings:

   1. (i) Four-foot medium bi-pin lamps shall be operated using the following reference ballast settings: T10 or T12 lamps are to use 236 volts, 0.43 amps, and 439 ohms; T8 lamps are to use 300 volts, 0.265 amps, and 910 ohms.
   2. (ii) Two-foot U-shaped lamps shall be operated using the following reference ballast settings: T12 lamps are to use 236 volts, 0.430 amps, and 439 ohms; T8 lamps are to use 300 volts, 0.265 amps, and 910 ohms.

   3. (iii) Eight-foot slimline lamps shall be operated using the following reference ballast settings:

      1. (a) T12 lamps: 625 volts, 0.425 amps, and 1280 ohms;
      2. (b) T8 lamps: 625 volts, 0.260 amps, and 1960 ohms.

   4. (iv) Eight-foot high output lamps shall be operated using the following reference ballast settings:

      1. (a) T12 lamps: 400 volts, 0.800 amps, and 415 ohms;
      2. (b) T8 lamps: 450 volts, 0.395 amps, and 595 ohms.

   5. (v) Four-foot miniature bipin standard output or high output lamps shall be operated using the following reference ballast settings:

      1. (a) standard output: 329 volts, 0.170 amps, and 950 ohms;
      2. (b) high output: 235 volts, 0.460 amps, and 255 ohms.
9. (3) Lamp lumen output (lumens) and lamp electrical power input (watts), at the reference condition, shall be measured and recorded. Lamp efficacy shall be determined by computing the ratio of the measured lamp lumen output and lamp electrical power input at equilibrium for the reference condition.