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Lightolier 

a Genlyte 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.

© 2011 Genlyte Group LLC • C0711

Job Information 

Type:

Job Name: 

Cat. No.: 

Lamp(s): 

Notes:

 

Lytecaster Recessed Downlighting 

603MR

Page 1 of 1   Recessed Linear Low Voltage 3 x MR16    Ceiling Opening: 5 3/8" (137mm) x 16 7/8" (428mm)

7 3/8"

6 3/4"

35"

16 7/8"

2"

6 3/4"

18 5/8"

Features

1.   Housing / Plate: 

 Die-formed 20 ga. steel ; Black painted finish. 

Accommodates all ceilings up to 2” (51mm) thick. Adjustable from inside. 
Concealed wiring channel.

2.   Face  Plate: 

Die-formed 20 ga. steel ; White painted finish. Inner Mounting 

ring welded of dimmers can further amplify the sound levels.to plate to 
accept 400 series trims. 1/4” (7mm) lip all around.

3.   Mounting  Brackets: 

16 ga. steel. Use 18” (457mm) mounting bars(optional) 

or with standard 3/4” (19mm), 1-1/2” (38mm) lathing channels (by others)or 
1/2” (13mm) tubing (by others). Adjust horizontally and vertically.

4.   Junction  Box: 

14 ga. steel, 5” (127mm) x 3-1/2” (89mm) x 1 1/2” 

(38mm)deep box, allows inspection from below. CSAUS certified for through 
branch circuit wiring with maximum of 8 (#12ga.), 90º C conductors.

5.   Transformer: 

Magnetic 150VA (Class “B”) and 75VA (Class “H”), 

120/277/347volt primary, nominal 12 volt secondary.

6.   Thermal  Protector: 

Meets CSA/UL requirements. Insulation, if used, must 

be kept 3”  away from luminaire sides and junction box. Do not cover top of 
luminaire.

7.   Socket:   

Porcelain body ; Two-pin (GX5.3 base) Pre-wired with 18 ga. 

Teflon250º leads to junction box.  

Markings

CSA,US ; Certified for damp locations.
 

Accessories

1950

 - 18" Mounting Bar

1951

- 31" Mounting Bar 

FA10251-WH - 

Replacement Spacer Ring

Note   

Magnetic transformers may produce audible sound which may be
objectionable in acoustically critical areas. The use of dimmers can further
amplify the sound levels. 

Complete fixture consists of Reflector Trim (3 needed), Frame-in Kit and Face Plate. Select each separately

404X series
405X series
406X series
409X series
413X series
478X series

Alzak Cones
Painted Baffles
Eyeball 
Pinhole
Gimbal 
Elbow

603MR120
603MR277

603WH

3 x 75W MR16
3 x 75W MR16
3 x 75W MR16
3 x 65W MR16
3 x 75W MR16
3 x 75W MR16

Reflector Trim

Frame-In  Kit  

Face Plate

Lamp

Frame-In Kit

Face Plate

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