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List of Current ratings for fluorescent lamps

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rjluna2:
I understand that both HO and VHO (SHO at other marketing) are rated 800 mA and 1500 mA respectfully.

I am wondering about the standard T12 and T8 tubes.  Do they have separate current ratings?  Correct me if I am wrong, the F40T12 have the current rating of 465 mA and the smaller T8 bulbs are around 260 mA.  Comments?

f36t8:
I have some data on current and voltage I found in Philips data sheets and compiled to a list a while ago. T8 is for European tubes. (but I think the T5 ranges are the same all over the world)


--- Code: ---
-T8

15 W
51 V 340 mA
18 W (compatible with 20 watt T12)
59 V 360 mA
30 W
98 V 360 mA
36 W (compatible with 40 watt T12)
103 V 440 mA
58 W (compatible with 65 watt T12)
111 V 670 mA



-T5 Miniature
4 W
29 V 170 mA
6 W
42 V 160 mA
8 W
56 V 150 mA
13 W
90 V 170 mA

-New T5 tubes (170 mA = HE tube, otherwise HO):

14 W
83 V 170 mA
21 W
125 V 170 mA
24 W
80 V 300 mA
28 W
166 V 170 mA
35 W
208 V 170 mA
39 W
119 V 330 mA
49 W
195 V 255 mA
54 W
118 V 460 mA
80 W
151 V 540 mA

--- End code ---

I don't understand why the product of the current and voltage isn't closer to their wattage, but these were the numbers given.

Medved:
@f36t8: The product is about 11% higher then wattage (PF = 0.9), because of shape mismatch between voltage and current on most series-choke ballasted discharge lamps:
Current is nearly sinusoidal, but voltage square-wave, what yield power factor sqrt(8)/Pi = 0.9

Adderall:
I have a copy of IESNA Lighting Handbook 5th (1972)  & 9th (2000)  edition.  If you have specific questions regarding US spec lamps, I'll gladly look it up.  

F40T12 is listed as 430mA, at least in N.A. or ANSI.  IEC may differ slightly.

F17T8, F25T8, F32T8, F40T8, F96T8 and their energy saver counter parts are all 265mA.  


The old generation T8s like F15T8 and F30T8 are different.  
The nomenclature is antiquated and is full of problems. Only the suffix tell you something definitively.
New generation T5s are not even listed in my books :(  

FxxTyy y=n/8 inches bulb diameter
xx could mean nominal length,watts or meaningless.  It only gets worse with emergence of energy saver lamps.

F25T8 is a 25W nominal 24" lamp. 
Now there is a new type that is 48", 25W Energy Saver intended to retrofit F32T8 48". The nomenclature differs between brands.  F32T8/XEW is Philips nomenclature for 48" nominal, medium bi-pin 265mA 25W energy saver lamp.  The 32 doesn't mean squat. 

F34T12 is the generally accepted notation for 48" T12.  34 means the watts here. 

Jace the Gull:

--- Quote from: Adderall on June 01, 2010, 10:48:08 AM ---I have a copy of IESNA Lighting Handbook 5th (1972)  & 9th (2000)  edition.  If you have specific questions regarding US spec lamps, I'll gladly look it up.  

F40T12 is listed as 430mA, at least in N.A. or ANSI.  IEC may differ slightly.

F17T8, F25T8, F32T8, F40T8, F96T8 and their energy saver counter parts are all 265mA.  


The old generation T8s like F15T8 and F30T8 are different. 
New generation T5s are not even listed in my books :( 

I will be really interested to hear! Thanks!!!




--- End quote ---

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