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4 1/2” Aperture, T4.5, Ceramic Metal Halide, 12° Spot

Job Information

Type:

Job Name:
Cat. No.:

Lamp(s):
Notes:

a Genlyte Thomas Company

www.lightolier.com

631 Airport Road, Fall River, MA 02720 • (508) 679-8131 • Fax (508) 674-4710
We reserve the right to change details of design, materials and finish.
© 2004 Genlyte Thomas Group LLC (Lightolier Division) • A0504

1. Spot Upper Reflector: Specular faceted aluminum; provides 12° beam.

Interchangeable with 25° Narrow Flood (MHT4RNF) and 40° Flood (MHT4RF);
see spec sheets C4T4A-MHT4RNF and C4T4A-MHT4RF.

2. Trim Kit: Low brightness aperture cone; anodized aluminum, self-flanged in

painted white or aperture-matching polished flange. Consult factory for other
finishes.

3. Lamp Shield: High-temperature glass as required by code; captive during 

re-lamping. 

4. Trim Kit Adjustment Mechanism: Provides 35° vertical tilt, 360° horizontal

rotation; lockable. Patented EZ-Aim Helical Drive System provides fast and
accurate hot aiming with Philips screwdriver.

5. Socket Housing: Galvanized steel, pre-wired with G8.5 pulse rated socket.

Snaps onto yoke for secure attachment without tools; unitized construction
assures proper alignment of lamp to optics for consistent optical performance.

6. Frame Housing: Steel, 0.029" (22-Ga.), matte black finish. Removable cover

for top re-lamping.

7. Frame Vertical Adjustment Mechanism: Accommodates mounting to 

virtually any ceiling system using pre-installed mounting bars, or 1/2" EMT
tubing (by others). Single locking feature secures all adjustments. Alignment
holes and markings allow fixture to be pre-set prior to installation. Final
adjustment can be made from below from inside fixture. 

8. Mounting Bars: Galvanized steel, 0.048" (18-ga.), pre-installed telescoping

bars extend to 30" long and lock securely into position. Built-in locking tabs
provide positive attachment to common T-bar systems. Self-centering feature
simplifies installation in 24" O.C. grid systems. Attaches to steel or wood
joists without accessories.

9. Retention Springs: Rust resistant springs secure trim for quick, tool-less

installation.

10.Ballast / Cover Assembly: Accessible from below and removable without

tools for inspection and ballast replacement .

11. Junction Box: 0.059" (16-ga.) galvanized steel. UL listed for 8 No. 12 AWG,

90° C through branch circuit conductors. Allows inspection from below. 

12. Optional Accessory Holder: Sold separately catalog # CAH4; die-formed

steel, matte black finish, slide-in installation. Accepts up to two 3 3/4" dia.
media.

13. Thermal Protector: (Not Shown) Meets NEC and UL requirements. Do not

install insulation above nor within 3" (76mm) of any part of the luminaire.

Electronic Ballast: 120V or 277V, 50/60 Hz., encased, high power factor, T.H.D.
<15%, thermally and transient protected, RMI/RFI complies with FCC Part 18
non-consumer limits, shut-down circuit at end of lamp life, sound rating “A”, 
-5° F minimum starting temperature, Type 1 Outdoor rating.

20W MH

M156

120/277

0.21/0.10

23

39W MH

M130

120/277

0.39/0.17 

44

70W MH

M139

120/277

0.67/0.29 

78

Chicago Plenum: Consult Factory

UL (Suitable for Damp Locations), CSA, I.B.E.W.

Ceiling Cutout: 5 1/8” (130mm) Dia.

For Complete Fixture Order: Trim Kit + Spot Upper Reflector (MHT4RS) + Frame-In Kit. Each Sold Separately.

Specular Clear, White Painted Flange

Specular Clear, Matching Flange

Comfort Clear Diffuse, White Painted Flange

Comfort Clear Diffuse, Matching Flange

Champagne Bronze, White Painted Flange

Champagne Bronze, Matching Flange

Electronic 120V

20W T4.5 

Ceramic MH

Electronic 277V

20W T4.5 

Ceramic MH   

Electronic 120V

39W T4.5 

Ceramic MH

Electronic 277V

39W T4.5 

Ceramic MH

Electronic 120V

70W T4.5 

Ceramic MH

Electronic 277V

70W T4.5 

Ceramic MH

Spot 

Upper Reflector