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%,

Model 2: ballasts in Power factor>0.95, THD<30%

Model 3: ballasts in Power factor>0.55

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.

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.