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Drop-In Irises

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A Drop-In Iris is the simple way of changing the beam size of a fixed focus  ellipsoidal reflector spotlight.  Just drop in an Iris, adjust the handle to change the beam size from fully open to nearly fully closed.  We have Irises to fit a variety of popular lighting fixtures.

CTI provides a limited lifetime warranty on all of its manual drop in irises. 

Name A B C D Cat. #
Source Four Iris (shown below) 4 25/32” 5 7/16” 1/2” 3” 2180
Source Four Jr. Iris 3 1/8” 4 9/32” 1/2” 2 5/16” 2185
Strand SL Iris 4 3/16” 5 3/16” 1/2” 3” 2186
Selecon Pacific Iris  4 31/64” 5 63/64” 1/2” 3” 2187

Drop-In Iris, Open and Closed


  • Offers precise, smooth control of beam size
  • Specially made leaves are tempered and heat resistant to over 1,000° F (538º C)




Drop-In Iris, Open and Closed

Drop-In Iris, being dropped into Source Four fixture

Drop-In Iris, in fixture

Drop-In Iris, in fixture, horizontal view

Drop-In Iris, precise beam control



Case Studies