EyeHortilux 600-Watt Super HPS Grow Light Bulb for Indoor Plants - High Pressure Sodium Hydroponic Gardening Lamp (1-Pack) - Perfect for Greenhouses, Grow Tents & Indoor Horticulture

If you want the best you have to pay more. These are the best. I just don't understand why the 600's cost more than 1000's.A 10% increase in yield, by using the best bulb, will result in an additional few hundred dollars worth of "produce". That's spectacular for a few extra bucks on the front end by merely buying these bulbs. Being a miser on hps bulbs isn't smart. If you're using hps, only use these!Veg anyway you want. Flower with Eye Hortilux Super HPS.Update: I've learned EH offers the best HPS bulbs....at a price. The last EH 600w SHPS bulb I bought was barely wrapped in a single layer of bubble wrap. The sale was fulfilled by Amazon. It only lasted 6 1/2 months. There's a pandemic going on and I've been unable to reach Amazon or Eye Hortilux Customer Service. These bulbs are expensive. If their warranty is useless I will investigate the new full spectrum passively cooled leds before I buy 1 more EH bulb. I will update this if Eye Hortilux or Amazon provides information or fulfills the warranty.2nd Update: EH eventually gave me a replacement. It took a while, as expected during an international crisis. I just can't quit thinking about those hlg Scorpion Diablo's, tho. I wonder how 1 would work when paired with a 600 EH SHPS in a 4x8? Hmmm.......