I don't think you can go too far wrong downgrading any manufacturers ratings you see by 50%. Using that logic your light is 100 lumens. My NiteRider Classic is also 100 (real) lumens. I know what that looks like. It ain't enough. But if you think it is you can have mine. I've upgraded to a MagicShine. It is a claimed 900 lumens. Most people believe it is around 400 (real) lumens. It is enough light. Not more than enough. Just enough.

I think it is also safe to make the following assumptions: if it uses AAA batteries it is for flashing duty only. If it uses AA batteries it is for main light back-up or helmet mount duty only. If it uses rechargeable battery packs with three or more 18650 cells you just might have a real headlight that you can see with.

Good mounted lights are the MagicShine, Gemini Titan or their clones. Better lights than these will cost as much as your bicycle and all your peripheral gear. One headlight of a car puts 1500+ lumens on the road. Most cars have two. Think about that and ponder why so many cyclists get excited at the thought of going out at night with under 200 lumens of headlight power.

H