G-15 video lighting issue.

[cps66]

I have a G-15 with a Fantasea housing and a Sea & Sea YS-01 strobe. I just purchased another flex arm and mounted an underwater flashlight to use for video. The video light is a Trustfire with triple LED's and an advertised 1600 lumen output.
link to flashlight specs, not sure I can add a link or not.
Buy TrustFire TR-DF003 3 x Cree XM-L T6 1600lm 5-Mode White Light Diving Flashlight - Black (2 x 26650)

I have been testing it in a dark room and all the videos I take have those horizontal black bars rolling up the screen.
I thought they would not appear on playback but when I run them on my computer I have the same problem.

Any suggestions would be appreciated.

Thanks.

 

[Hatul]

Can I ask you if the black bars appear when taking video in daylight or other light?

 

[cps66]

No, the bars appear only when I was taking video in a dark room with the light turned on. In daylight or with the ceiling lights on in the room they disappear.

 

[Hatul]

I may be wrong but the light could be flashing on and off and perhaps it's interacting with the shutter

 

[jimw]

I see the light has 5 modes--try other modes if you have not as of yet!