Hps bulb 600w phantom ballast

I'm about to start flowering in a week or so. I'm wondering what's a good hps bulb for a 600w phantom. I'm thinking horti. I'm growing vertically bare bulb with wall of weed feeding kiss style in coco hempy buckets. I have a ipower hps but it sometimes doesn't fire up, and I would like to see the output of a quality bulb

I use AgroMax bulbs.

Just find a decent full spectrum HPS don't go cheap.

I'm gonna go with ushio. Reasonably priced on eBay and I've read excellent reviews. 97k lumens too. Trying to make the best outta this grow.