How many lumens are ideal for candling maran eggs?

[ShadesofSable]

I have some maran and maran mix eggs I need to candle, but I can see next to nothing with my current home rig! I'm getting ready to buy a new flashlight tonight, what's a good lumens amount to look for that'll light up a marans egg easily?

 

[chuckalope]

I use my iPhone flashlight, it works perfect.