Recommend you get a copy of Westinghouse Lighting Handbook
In one table they show lumens output for various fluorescent lamps with
current and volts input required.
for the Preheated
des. len curr. vol. *pwr lumens *lumens/watt
4W 6 0.132 32 4.32 115 26.6
6W 9 0.147 47 6.91 250 36.2
8W 12 0.170 56 9.56 420 43.9
20W 24 0.380 56 21.32 1220 57.2
30W 36 0.355 98 34.8 2100 60.3
84W 60 1.530 63 96.4 6250 64.8
for the High Output
len *pwr lumens *lumens/watt
24 32.8 1600 48.8
48 60 4000 53.5
72 90.4 6450 71.3
96 1328 9000 68.2
for the Super-Hi, Outdoor, and Low temp-jacketed
len *pwr lumens *lumens/watt
48 129 6900 53.5
72 192 11100 62.5
96 258 15500 60.1
*calculated values
Appears to be a nonlinear relationship.
Also, Slimline which come in smaller/different diameters have different
lumens per watt for the same length.
There is another curve rating efficiency (lumens per watt) which ranges from
52 lumens per watt for a natural color lamp to 80 lumens per watt for warm
white lamps. But it doesn't say which basic tube is used as a reference.
Probably 72inch
Is this enough for you to do your modeling?
- Robert -
Robert A. Macy, PE [email protected]
408 286 3985 fx 408 297 9121
AJM International Electronics Consultants
619 North First St, San Jose, CA 95112
-----Original Message-----
From: Wani, Vijay (V) <[email protected]>
To: '[email protected]' <[email protected]>
List-Post: [email protected]
Date: Wednesday, February 27, 2002 8:27 AM
Subject: CCFL light output
>
>Group:
> I am trying to build a thermal model a cold cathode fluorescent lamp
(CCFL)
>for cooling analysis. CCFL manufacturer showing a chart of light output in
>Lumens as a function of lamp length and diameter. I need to convert lumens
>to watts for input into Icepak. I would appreciate any help you can
provide.
>
>thank you in advance.
>
>Vijay Wani
>
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