look here: HID-Lights - High Pressure Sodium Light Bulbs - 1000-Bulbs - The Light Bulb Superstore
click on the details for each lamp you are considering ... look for the 'lumens' output, that's what you are wanting ... notice the 'initial lumens' is higher, the lamp quickly drops its output after a short time ... :smokin:
the image reaper Reviewed by the image reaper on . what do you think??? i have a 5 sq ft. space that is 71 inches tall. I'm currently running a 150 hps light. I already know i need more light. i was planning to get a 250 watt hps. but then i got a bright idea why not just get another 150 watt hps light? it would be cheaper, bulbs are cheaper and it would be 300 total watts. but with the two 150 watt light combo i would be putting out 3200 lumen and the 250 with the bulb it comes with puts out 3300 lumen. and i only plan to grow 2 plants at a time my first Rating: 5