HPS lamps (high-pressure sodium lamps) have been among the most proven light sources in indoor growing for decades. Especially during the flowering phase they impress with their red-heavy light spectrum, which optimally supports flower and fruit formation. Thanks to their high light intensity, HPS lamps penetrate deep into the canopy, enabling strong yields even with larger plants. Whether in a grow tent or a professional grow room – HPS lamps are a reliable choice for growers who rely on consistent results.
Here you'll find replacement HPS bulbs for your fixture or reflector: Philips GreenPower and MASTER GreenPower Xtra, GE Lucalox, Horti Sun Power PRO and Platinum lamps in 400, 600 and 1000 watts. Always match the bulb to your ballast's wattage and to the socket type: single-ended bulbs fit E40 sockets, while double-ended (DE) lamps need a DE fixture. HPS bulbs lose output over time, so many growers replace them after a few cycles. Filter by wattage in 600W HPS lamps or 1000W HPS lamps, and find ballasts in lighting accessories.
Questions & answers about HPS Lamps (Bulbs)
All growing questions →- Lighting LED or HPS: which grow light is better? LED, for most people with a tent. It's more efficient, makes less heat and the diodes last years. HPS costs less to buy but needs more ve... Read the answer →
- Lighting How many lumens does a grow room need per square metre? None, really. Lumens measure what your eye sees. Plants use PPFD, in µmol/m²/s, so compare lamps on that. Read the answer →
- Lighting How many hours of light do plants need in veg and in flower? Photoperiod plants usually get 18 hours on and 6 off in veg, then 12 on and 12 off to flower. Autoflowering plants can stay on 18/6 or up... Read the answer →
- Problems & pests What is light burn and how do I stop it? Light burn shows as bleached, yellow or crispy leaves at the top, closest to the lamp. Raise the lamp or dim it. Read the answer →
Advantages of HPS Lamps for Indoor Growing
Bloom-optimized light spectrum: promotes flower formation & yields. High light intensity: penetrates even dense canopies. Proven technology: the standard in indoor growing for years. Cost-effective: an affordable entry into powerful lighting. Compatible: usable with all common ballasts & reflectors.
HPS Lamps in Different Wattages
Depending on the size of your grow tent or grow room, HPS lamps are available in different power ratings:
250W HPS: for small grow tents (e.g. 60x60 cm). 400W HPS: for medium-sized tents (e.g. 100x100 cm). 600W HPS: the standard choice for many growers, suited to 120x120 cm. 1000W HPS: for large grow rooms and maximum yields.
Accessories for HPS Lamps
For HPS bulbs to deliver their full performance, the right accessories are essential:
Ballasts (electronic or magnetic): regulate power supply & efficiency. Reflectors: distribute light evenly in the grow tent. Extraction systems & duct fans: keep temperatures stable. Carbon filters: ensure odor-free exhaust air.
Buy HPS Lamps
Whether you're a beginner or a professional – HPS lamps (bulbs) are a proven solution for indoor growing. With a strong flowering spectrum, high intensity and simple handling, they offer optimal conditions for strong plants and rich harvests. Combined with a ballast, reflector and extraction systems, HPS lamps remain a staple of indoor growing even today.
