Ive used a lot of different hps bulbs over the years.
My favorite one to use is
SUNMASTER SL.1000W.U25 2.1K YELLOW BLOSSOM
SUNMASTER High Output HPS Lamps are High Pressure Sodium lamps designed to deliver 10% more light than standard HPS lamps. This extremely energy-efficient plant grow lamp provides more energy which is essential for optimized photosynthetic response. The Sunmaster Super HPS is the highest output HPS bulb available providing much higher Photosynthetic Active Radiation (PAR) for plant photosynthesis. See our complete line of 600W HPS lamp models.
Sunmaster High Output High Pressure Sodium Lamps Feature:
- Super high output lamp technology
- Optimized spectrum, distribution pattern, lumen output and illumination
- Reliable operation throughout the growth cycle
- Highest quality and consistent performance
Having the proper amount, and spectrum of light is imperative to ensure that you have the healthiest, most successful and succulent crop. This high intensity discharge (HID) bulb produces red spectrum light that is vital to a plant during their flowering or fruiting stage.
SunMaster uses cutting-edge technology to produce highly efficient, and energy saving grow lights that deliver unmatched performance for growers at an affordable price. This SunMaster Super HID product has an extensive life of up to 19,000 hours. Performance, and durability of these bulbs can always be optimized by using the right HID ballasts.
Weight: 0.8 lbs.
Package Dimensions: 15.4L x 3.4W x 3.4H
Max. Wattage: 1000
Base Type: Mogul (E39)
HID Type: Sodium
Initial Lumens: 150,000
Warranty: 1 Year
Bulb Orientation: Universal
Bulb Shape: T25
Average Rated Life Hours: 24,000