Question about a mechanic in the Oryx Fight (Destiny)

by BeardFade , Portland, OR, Friday, January 22, 2016, 16:27 (3322 days ago)

Last night, I had the fortune of finishing the hardmode raid for the first time. Thanks to all those who helped. Having taken a few stabs at it, I learned of a mechanic that we didn't discover in the normal mode raid that I'm hoping you all can explain further.

After we've stunned Oryx, what triggers the timer for his blinding/killing light? In my normal mode raids, we have immediately gone and detonated our orbs, but in the hard mode raid, we cleared adds first. Honestly, my normal raid group didn't even know this was an option as we thought the timing had to be done right away.

So I guess my main question is, how do you know when you're out of time to go and detonate orbs?