Question 1: What are the differences between analog ballasts with filter and digital ballasts with filter?

Digital ballasts get less hot compared to analog ballasts and their designs include MOSFETs, whereas analog ballasts contain transistors. Moreover, digital ballasts have a safety feature for the protection of fluorescent lamps.

Question 2: What are the differences between electronic ballasts with filter and electronic ballasts without filter?

Electronic ballasts with filter can prevent and filter the total harmonic distortion (THD) in the current coming from the mains, whereas electronic ballasts without filter are not capable of doing that.

Question 3: What is warm-start and cold-start? Which of these techniques do you use in your products?

In warm-start, the cathodes of the lamp are preheated to the right temperature and the ignition of the lamp is optimized. This prolongs the life of the lamp. In cold-start the cathodes of the lamp are ignited without preheating and this causes faster consumption of the emission materials of the cathodes. We use warm-start in our products.

Question 4: What does power factor and ballast luminance factor in electronic ballasts mean?

Power factor is the factor that defines the proximity of the total power extracted from the mains to the active power. If the power factor is close to or equal to 1, it is a good sign. If that is the case, the power extracted from the mains decreases. In electronic ballasts this value is approximately 0.95 and the power factors are good. Ballast luminance factor is the ratio of the light intensity emitted by a lamp working with a specifically produced ballast to the light intensity emitted when working with the reference ballast.

Question 5: What does active and passive PFC (Power Factor Correction) mean?

In active PFC the power factor approaches 1. In passive PFC the power factor is corrected at a specific ratio and limited value.