Welkin Electronics (Sanwei), an electronic liner fluorescent ballasts manufacturer in China.

We mainly sell T8 32W 120V & 277V ballasts with UL & FCC certificate to North and South of America. (UL No. E247096) And we are also supplying T8 18W/36W, 20/40W 220V & 120V, T5 14W/21W/28W/35W 220V & 120V electronic ballasts to Latin America.

Our ballasts are used popular in Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama, Bahamas, Barbados, Cuba, Dominican Rep., Grenada, Haiti, Jamaica, Trinidad Tobago, Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Paraguay, Peru, Surinam, Venezuela, Uruguay, USA, Canada & Mexico. The products we supply can be divided into:

1. Usual model: Power factor>0.98, >0.95 & >0.55 three types
2. UL & FCC listed model: Power factor>0.99


1. Usual type electronic ballast

Model 1: ballasts in Power factor>0.98, THD<10%,
1x17w??? T8??? 120V??? WK-T8-232/IS/120SC-1
1x25w??? T8??? 120V??? WK-T8-232/IS/120SC-1
1x32w??? T8??? 120V??? WK-T8-232/IS/120SC-1
2x17w??? T8??? 120V??? WK-T8-232/IS/120SC-1
2x25w??? T8??? 120V??? WK-T8-232/IS/120SC-1
2x32w??? T8??? 120V??? WK-T8-232/IS/120SC-1
1x17w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
1x25w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
1x32w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
2x17w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
2x25w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
2x32w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
2x20w??? T12??? 120V??? WK-T8-218/IS/120SC
2x40w??? T12??? 120V??? WK-T8-218/IS/120SC
3x17w??? T8??? 120V??? WK-T8-432/IS/120SC
3x25w??? T8??? 120V??? WK-T8-432/IS/120SC
3x32w??? T8??? 120V??? WK-T8-432/IS/120SC
4x17w??? T8??? 120V??? WK-T8-432/IS/120SC
4x25w??? T8??? 120V??? WK-T8-432/IS/120SC
4x32w??? T8??? 120V??? WK-T8-432/IS/120SC
3x17w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
3x25w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
3x32w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
4x17w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
4x25w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
4x32w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
2x18w??? T8??? 220-240V??? WK-T8-218/IS/220HSC(P.F.0.99)
2x36w??? T8??? 220-240V??? WK-T8-236/IS/220HSC(P.F.0.99)
3x36w??? T8??? 220-240V??? WK-T8-336/IS/220HSC(PF. 0.99)

Model 2: ballasts in Power factor>0.95, THD<30%
1x17w??? T8??? 120V??? WK-T8-117/RS/120L
1x25w??? T8??? 120V??? WK-T8-125/RS/120L
1x32w??? T8??? 120V??? WK-T8-132/RS/120L
2x17w??? T8??? 120V??? WK-T8-217/RS/120L
2x25w??? T8??? 120V??? WK-T8-225/RS/120L
2x32w??? T8??? 120V??? WK-T8-232/RS/120L
2x18w??? T8??? 120V??? WK-T8-218/RS/120L
2x36w??? T8??? 120V??? WK-T8-236/RS/120L
2x20w??? T12??? 120V??? WK-T8-218/RS/120L
2x40w??? T12??? 120V??? WK-T8-236/RS/120L
4x32w??? T8??? 120V??? WK-T8-432/IS/120L
1x32w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
2x32w??? T8??? 120V-277V??? WK-T8-232/IS/120-277SC
3x32w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
4x32w??? T8??? 120V-277V??? WK-T8-432/IS/120-277SC
1×8w??? T5??? 120V??? WK-T5-108/RS/120L
1×14w??? T5??? 120V??? WK-T5-114/RS/120L
1×21w??? T5??? 120V??? WK-T5-121/RS/121L
1×28w??? T5??? 120V??? WK-T5-128/RS/120L
2×14w??? T5??? 120V??? WK-T5-214/RS/120L
2×21w??? T5??? 120V??? WK-T5-221/RS/120L
2×28w??? T5??? 120V??? WK-T5-228/RS/120L
4x14w??? T5??? 120V??? WK-T5-414/RS/120L
1x18w??? T8??? 220-240V??? WK-T8-118/RS/220L
1x36w??? T8??? 220-240V??? WK-T8-136/RS/220L
2x18w??? T8??? 220-240V??? WK-T8-218/RS/220L
2x36w??? T8??? 220-240V??? WK-T8-236/RS/220L
4x18w??? T8??? 220-240V??? WK-T8-418/RS/220L
3x18w??? T8??? 220-240V??? WK-T8-318/RS/220L

Model 3: ballasts in Power factor>0.55
1x17w??? T8??? 120V??? WK-T8-117/RS/120D
1x25w??? T8??? 120V??? WK-T8-125/RS/120D
1x32w??? T8??? 120V??? WK-T8-132/RS/120D
2x17w??? T8??? 120V??? WK-T8-217/RS/120D
2x25w??? T8??? 120V??? WK-T8-225/RS/120D
2x32w??? T8??? 120V??? WK-T8-232/RS/120D



2. UL type electronic ballast
we have 2-Lamp-T8 (Two or One Lamp Operation) and 4-Lamp-T8 (Four or Three Lamp Operation) in 120V, 227V & Universal models.

All T8 UL ballasts could operate lamps of F17T8 24 inch, FB24T8 16.5 inch, F25T8 25W 36 inch, FB31T8 31W 22.5 inch, F32T8 32W 48 inch, F25T12 and F40T8.

1x17w??? T8??? 120V??? WK-T8-232/IS/120SC
1x25w??? T8??? 120V??? WK-T8-232/IS/120SC
1x32w??? T8??? 120V??? WK-T8-232/IS/120SC
2x17w??? T8??? 120V??? WK-T8-232/IS/120SC
2x25w??? T8??? 120V??? WK-T8-232/IS/120SC
2x32w??? T8??? 120V??? WK-T8-232/IS/120SC
1x17w??? T8??? 277V??? WK-T8-232/IS/277SC
1x25w??? T8??? 277V??? WK-T8-232/IS/277SC
1x32w??? T8??? 277V??? WK-T8-232/IS/277SC
2x17w??? T8??? 277V??? WK-T8-232/IS/277SC
2x25w??? T8??? 277V??? WK-T8-232/IS/277SC
2x32w??? T8??? 277V??? WK-T8-232/IS/277SC
1x17w??? T8??? 120V-277V??? WK-T8-232/IS/120-277HSC
1x25w??? T8??? 120V-277V??? WK-T8-232/IS/120-277HSC
1x32w??? T8??? 120V-277V??? WK-T8-232/IS/120-277HSC
2x17w??? T8??? 120V-277V??? WK-T8-232/IS/120-277HSC
2x25w??? T8??? 120V-277V??? WK-T8-232/IS/120-277HSC
2x32w??? T8??? 120V-277V??? WK-T8-232/IS/120-277HSC
3x17w??? T8??? 120V??? WK-T8-432/IS/120HSC
3x25w??? T8??? 120V??? WK-T8-432/IS/120HSC
3x32w??? T8??? 120V??? WK-T8-432/IS/120HSC
4x17w??? T8??? 120V??? WK-T8-432/IS/120HSC
4x25w??? T8??? 120V??? WK-T8-432/IS/120HSC
4x32w??? T8??? 120V??? WK-T8-432/IS/120HSC
3x17w??? T8??? 277V??? WK-T8-432/IS/277HSC
3x25w??? T8??? 277V??? WK-T8-432/IS/277HSC
3x32w??? T8??? 277V??? WK-T8-432/IS/277HSC
4x17w??? T8??? 277V??? WK-T8-432/IS/277HSC
4x25w??? T8??? 277V??? WK-T8-432/IS/277HSC
4x32w??? T8??? 277V??? WK-T8-432/IS/277HSC
3x17w??? T8??? 120V-277V??? WK-T8-432/IS/120-277HSC
3x25w??? T8??? 120V-277V??? WK-T8-432/IS/120-277HSC
3x32w??? T8??? 120V-277V??? WK-T8-432/IS/120-277HSC
4x17w??? T8??? 120V-277V??? WK-T8-432/IS/120-277HSC
4x25w??? T8??? 120V-277V??? WK-T8-432/IS/120-277HSC
4x32w??? T8??? 120V-277V??? WK-T8-432/IS/120-277HSC
??? ??? ???
2x18w??? T8??? 120V-277V??? WK-T8-218/IS/120-277HSC
2x36w??? T8??? 120V-277V??? WK-T8-236/IS/120-277HSC

We could guarantee our UL type ballasts are with high quality as the counterparts from Advance, Sylvania, Robertson and Howard etc.
* Feature the highest quality components available, 100% factory tests
* Meets ANSI Standard C82.11-1993 and ANSI Standard C62.41-1991.
* Meets CSA Standard 654 for Ballast Efficiency
* Meets Energy Star Requirements for (2,1) F32T8, (2) F25T8 and (2) F17T8
* Meets FCC Part 18 (Class B) and CSA, EMI/RFI requirements, Consumer Limits.
* 120V/277V, +/-10%, 60Hz, PF≥0.99, THD≤10%, life span≥3 years.

Contact: Mr. Paul Li

Welkin Electronics(Sanwei)