Hi Alvin, mind sharing more information on your setup?
I'm shooting a Sony A7R2 with 90mm macro and 28/2 lens at the moment. I have Nauticam housing with the small HD 501 monitor and housing for composing video and focus. For the wide stuff i'm using the 28/2 together with the Nauticam WWL wet lens. For lights i'm using the Weefine Solar 3800 lumens light at the moment as it has a high CRI of 95.
Canon 5D MK III
Canon 100mm L Macro, Canon 16-35mm L, Canon 8-15mm FE, Nexus Housing
Sony A7R2, A6300 Sony 90mm Macro, Nauticam Housing
Inon Z-240 Strobes, Weefine Video lights, FIT Focus lights