At this line the attribute bars are build:
https://github.com/esoui/esoui/blob/...ebars.lua#L452
The class ZO_UnitAttributeVisualizerplayer (defined here: ) will later take the control with the variable "healthControl" to apply the glow etc.
The global variable for the attribute bars is PLAYER_ATTRIBUTE_BARS, defined here
https://github.com/esoui/esoui/blob/...ebars.lua#L714
So you can get the healthControl of the global var like this:
Lua Code:
local healthControl = GetControl(PLAYER_ATTRIBUTE_BARS, "Health")
Maybe you can then check the child controls of the healthControl (e.g. via the addons zgoo or merTorchbug to get a list of functions, attributes and childs) and there exists one with the name Glow somewhere, which you can try to assign to a variable and use glowControl:SetHidden(true)