





The Sylvania GROLUX bulb was the first bulb in this country that was designed from the ground up specifically for growing plants yes, even the Hortilux bulb was not originally designed for plants. It has the highest PAR rating meaning it has the highest plant-usable light output of any 400 HPS bulb on the market, in addition to having 30% more blue spectrum than a standard HPS bulb. It is the best bulb you will find in the U.S., far exceding the performance of all other bulbs currently available, including the Hortilux and for less money.NOTE updated 03/2005: Some BGH customers have been experiencing problems with the 400W version of the Grolux bulb. These problems include bulbs not lighting up to full intensity or spectrum, and bulbs working for 2 weeks, then failing. The manufacturer will still honor the full 1 year warranty in the event the bulb fails, but we want to make sure our customers are aware of and consider the higer than normal failure rate we have experienced with these bulbs before making their purchase.
| ASIN | B00DQAC4S2 |
| Customer Reviews | 4.2 4.2 out of 5 stars (119) |
| Item Weight | 6.7 ounces |
| Item model number | gro-lux |
| Manufacturer | Sylvania |
| Product Dimensions | 11.5 x 1.89 x 11.5 inches |
Trustpilot
2 months ago
5 days ago
1 month ago
3 weeks ago