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From what I have read low pressure sodium puts outapprox 180 lumens/watt so a 100 street light would be1800 lumens, a 400 watt bulb would be around 72,000lumens using that figure.
In respect to this, how many lumens is the average street light?
2004. "The lamps used in streetlights vary inboth size and consumption (typically between 35 and 250 Watts)depending upon whether they are lighting a residential area, mainroad or a town centre." "It is generally assumed that theaverage wattage of a streetlight is about 80 watts."Outdoor Lighting Handbook.
Also Know, how many lumens do you need to light up a room?
To determine the needed lumens, you willneed to multiply your room square footage by yourroom foot-candle requirement. For example, a 100 square footliving room, which needs 10-20 foot-candles, willneed 1,000-2,000 lumens. A 100 square foot diningroom, which needs 30-40 foot-candles, will need3,000-4,000 lumens.
The total lumens lighting required are equal to1,800 square feet times 30 foot candles per square foot, or 54,000lumens. Calculate how many lights you need.Incandescent bulbs and fluorescent lights have lumenratings on their packaging. Divide the lumen rating into thetotal lumens you need.