There are a number of websites where one can find information about 400 watt High Pressure Sodium lights including HTG Supply, Buy Lighting, Hydro Empire and 420 Magazine.
It is possible that a 600 watt amp could be louder than a 400 watt amp when paired with 400 watt woofers, but it also depends on other factors like speaker efficiency and the overall quality of the components. More wattage generally means more power and potentially more volume, but it's not the only factor that determines loudness.
It will power two 400 watt lamps.
1 Joule is 1 Watt-Second. 1 Watt Hour is 3600 Watt-Second or 3600 Joules. 400 Watt-Hours is 1440000 Joules.
To convert 400 Watt hours to BTU, you need to multiply by 3.412 to get the energy in BTU. So, 400 Watt hours is equivalent to approximately 1364.8 BTU.
ummm...4(?) is this a trick question?
Per hour the answer is 400 watt-hours or 0.4 kW-hours (or units).
Not for very long it will over extend voice coil and basically render sub as a paper weight.
The solar component for a 10 watt system can be had for under $400 USD.
800 watt should be fine
A 400 watt Mercury vapor light bulb produces roughly 23,000 lumens. In comparison to a 400 watt metal haloid and or high-pressure sodium, not as good. Metal haliod and high-pressure sodium produces 30,000 lumens.
430 watt bulbs are made to juice a little more light from a standard 400 watt ballast. you get about 3-5000 more lumens. A typical 400 watt HPS produces about 50-55,000 lumens. The 430 will put out about 58,000. Not a lot, but a little extra without any increase in power usage.
Yes U can just make sure they are the same size (watts) and base configuration (R59) or so.