club pools

I would like to know why two pools at the club house, the guest pool and the indoor pool are open til 10:00 pm, and the resident pool closes at sun down ? I dont think this is right. Also the pool at Hastings is not open till ten pm also. It use to be! I know myself and other people I have talk to would like to have the pools open till 10 pm. I went to Anita Cruz office to ask her but she was not there. Her helpers gave me what i thought was a answer that did not make much sence to me, something about lighting. There is lighting in the pool and around the pool im talking about the resident pool now. It does not have the lights as bright as guest pool but you can see. Now there is no life guards at any of the pools so what is the difference if one pool is lite more then another. It sure would be nice to swim later in the evenings on the hot summer night in the resident pool.
----------------------------------------------------------------------------------------------
Hi Marc,
Following is the applicable code for Night Operation of a pool in Florida.
Lighting, and the intensity thereof, does indeed appear to be an issue.

Dave Israel

REF:

http://www.ceitampa.com/publications/pdf/2003_FL_Building.pdf

The following extract from the Florida building code applies:

424.1.9.8.4

If night operation is proposed, 6 footcandles (60 lux) of light shall be provided on the pool deck and the water feature area. Lighting that may be exposed to the feature pool water shall not exceed 15 volts, shall be installed in accordance with manufacturer's specifications and be approved for such use by UL or NSF.

End extract.

The LUX unit may be strange to some, it is a measure of the apparent intensity of light. By "apparent" is meant as perceived by the "normal" human eye. More confusing yet is that the eye perceives light of different colors (wavelengths) differently (at different intensities). Hence, Yellow light at a given intensity appears brighter than Blue light at the same intensity.

Watt is a measure of Power; hence conversion is a bit complex. Nominally, 60 LUX is equivalent to .008334 Watts/Square foot. So, over an area of Pool Deck and Pool of, say, 10,000 square feet; Code requires the Irradiance equivalent to that produced by an effective power of an 83.34 Watt bulb over the entire area, a rather significant requirement.

Thanks for the neat question.

Dave