6-inch Cooltube, will a super spreader fit?

Does anyone have experience/know if a super spreader will fit in a 6 inch cooltube? Or can you estimate the distance it sits from your bulb?

I want to stop some of the direct hot spots right under the light, I figure this will help with temps at canopy level

No one has any experience with this?

I'm in the same boat. My fear would be that it over-spreads my inner-reflected cool tube where I have too much light going straight to the sides and less down. But hot spots suck!... It's only $40 if I get it I'll post my comments.

After a lil time on El Google it seems nobody has measured the light spread ability just acknowledgement it helps with hot(heat) spots in open reflectors. In my garden a cooltube is a necessity because of heat but I hate the light intensity differences between just a few inches either way. Any suggestions?