DC 12V, DC 24V, DC48V input voltage Led T8 fluorescent tube lighting light lamp bulb introduction

Sometimes you need to Led T8 fluorescent tube lighting in Boat, train, subway, public bus, In this application, most input voltage is DC12V, DC24V, DC48V.

But what is the difference between AC input voltage Led T8 fluorescent tube (Always AC85-265V or AC100-240V) with DC input voltage Led T8 tube (Always DC12V, DC 24V, DC 48V).?

Below is a table to compare the difference between AC and DC input voltage Led T8 fluorescent tube lighting lamp.

Product	CE,ROHS	UL	Power efficiency	Led Driver
DC 12V,24V,48V input voltage Led T8 Fluorescent tube lighting lamp	Yes,necessary	Not necessary	Only 60lm/w	No need Led driver
AC85-265V,AC100-240V input voltage Led T8 Fluorescent tube lighting lamp	Yes,necessary	Necessary	Can reach 100lm/w	Yes, need Driver

From above table, we can see that DC input voltage advantage is:

1. Do not need UL certification, can sell in USA and Canada.

2. Safty.

But disadvantage is :

1. Power efficiency is low

Why DC input voltage Led T8 fluorescent tube lamp lighting lights Power efficiency is low, because DC input voltage PCB design is different with AC 85-265V input voltage Led T8 retrofit tube lighting.

Please see below pictures.

DC 12V,24V,48V input voltage Led T8 tube PCB design

AC85-165/AC165-265V Led T8 fluorescent tube lighting lamp PCB design.

Because DC input voltage LED T8 tube PCB design have many pieces Resistance, so add the power assumption, If the Led Tube lighting power is 10W, actually, Total Led Power may be only 6W-7W, Thus, the total lumens will be only 600-700lm.

So DC12V,24V,36V,48V input voltage Led T8 fluorescent tube lighting lights lamp Power efficiency is less than AC85-165V or AC165-265V or AC85-265V.

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