Here is an egg I just candled they are 3-4 days, a little blurry cause don't have a very steady hand.
You can just make out some veins and a little spot. This is with a 35 luminance energizer LED flash light 10 bucks at Target.

You can just make out some veins and a little spot. This is with a 35 luminance energizer LED flash light 10 bucks at Target.