LED backup light "after glow"

[cdrice15]

Put in some led bulbs in the backup lights of my truck yesterday. I went down the road last and when I got back I noticed the lights had a low "glow". I didn't install resistors cause I thought they weren't need for backup lights. I only went like 2 miles down the road and back. This morning they don't appear to have that glow. Is it normal for them to "glow" for a little bit after there on or is something wrong?
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[BlackedOutHemi]

Well. In simple terms, yes it is normal. My reverse lights and my cargo lights on my last truck both did this. They would glow for about 20 minutes and then shutoff.

 

[cdrice15]

OK. Thanks for the reply.

Sent from my Electrify

 

[Sagebrush2500]

Interesting information... thanks so much as I'm sure I'll wonder this when I (finally) get around to installing LEDs

 

[rizzleram]

I wonder why they do that?