Flowering with a veg bulb will make the plants grow tighter nodes, and be slightly shorter than flowering with a flower bulb. A veg bulb also runs a couple degrees cooler than a flower bulb. A veg bulb will also create more frost (trichomes) vs a flower bulb. Vegging with a flower bulb will create a lankier (more distance between branches and nodes).
I see your goods are pretty small. If your crafty, you can modify the hoods in more of a bat-wing type of hood. This will allow the light to spread out more and allow you to drop your hood height a tad. Combine that with a trellis net, and I'm sure your gonna have better yields.
When I ran my flower room, it was 4x 315cmh in air cooled big kahuna hoods, 2 levels of trellis nets, and 1400ppm co2. These hoods are massive, and the bulbs are adjustable (up/down/forward/ back). I ran these about 1.5' above the canopy with out issues, ever in the 6+yrs I ran the room this way.