National Highways, which manages the A49 through the county, said planning permission shouldn't be granted for another three months so the club has more time to answer its questions.
Ellie Smith, an assistant spatial planner at the government-owned firm, said as part of the planning permission consultation process that she was concerned about "glint and glare" affecting A49 drivers.
She has asked the applicant, stadium director Darren Ball, to give more information to ensure the replacement 21-metre LED floodlights would not impact on the safety of the A49.
She said "specific design metrics" had not been provided and the stands would provide no screening to the road.
She also referenced Institution of Lighting Professionals' guidance which suggests a curfew starting between 9pm and 11pm.
Part of the extra information she wants is about the environmental zone, which describes how built-up an area is; the curfew that could be in place for the lights; and details about whether the club wants to use the floodlights after the curfew.
She said no analysis data for glare and sky glow had been provided but the application suggested the effects of light seen outside of the stadium would be managed.
That appeared to reference provider Musco's claim that its lights are directional and avoid unwanted spill.
Ms Smith said that light spill and sky glow do not concern National Highways in a planning sense, and there would be "good inherent control built into the proposals"
But she added there was no data provided for glare performance and there was "potential for light source visibility from adjacent roads".
She has now called on the club to provide a glare analysis to ensure A49 drivers are not affected.
The old floodlights will not be dismantled as soon as the new lights are installed.
While the club are handling the new floodlights, Herefordshire Council will be responsible for taking down the old towers, documents suggested.