[LG Optimus L90] brossovitch:
Honestly, being a little obsessive, I've noticed I get better battery with my light theme. However, I had good battery on a couple of dark themes also. But the theme I use is very well made and quite honestly perfect, OrionDroids did a fantastic job on it.

Yes, the savings difference is negligible. But I can say at the end of a average day that I have approximately 5-10% battery savings over a dark theme on my L90. Not much to fuss about. But it doesn't feel heavy or intrusive on my device.

And sometimes it depends on the theme itself. Some dark/black themes actually use more battery on my Galaxy AMOLED devices while others actually do better.

On my Galaxy tab4, running a highly modded stock ROM I see a significant power savings with more dark themes/screens. In fact its a matter of using 70% battery on lighter themes and using 30% battery on dark themes in a few hours of average use. This week, with light themes 8hrs killed my battery. With dark themes 12hrs killed my battery. Same brightness and heavy use.

I usually have my tablet getting around 26-40 hours of time between charges. But this device is quite special.

On my CM12.1/13 Galaxy S3, using no theme (stock Android light theme) actually gets me better power savings. The device is laggy and sometimes bootloops with some themes installed.

At this point it becomes more about how intrusive the theme actually is on the ROM. At least in my opinion and testing for my particular device.

I do keep my brightness at less than 50% practically all the time as well. The L90 screen is very bright!

On my L90, I've seen about 4-5 hours of screen on time with light themes on a battery before reaching 10% (from a full charge) and 2-2.5 hours of screen on time with dark themes before reaching 5%. There are other factors here like messages and network connectivity of which I don't actually have control.

I do personally notice the difference and the L90 seems to have issues with dark themes.

This could also be attributed to me not actually finding the right theme for a good power savings.

Can anyone actually suggest a good dark theme?

I'd love to actually try this out a bit further. Also, something with very few reds would be good, I'm not a big fan of red. This could be my downfall..

One thing I can say for sure is that on my L90 while using Night Mode my battery gets used very quickly.

Thank you [MENTION=6227169]mosimchah[/MENTION] for extra clarification!

I apparently just wrote a novel on this thread, sorry guys.

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---------- Post added at 06:31 ---------- Previous post was at 06:10 ----------

Have you ever run stock Lollipop? If not you may need to actually flash a LP bootstack for your device since the fingerprint of this ROM is LG 5.0.2 and you came from 4.4.x..

I cannot say for sure whether a kitkat bootstack will work on this ROM or not, but it is a theory. I'm sure someone can verify. I'll try and flash my 10c bootstack. I'm currently using a 20c bootstack and have not many issues. But I definitely have some.

I was under the impression that it didn't matter what bootstack we have. However, since this ROMs footprint is based on LGE 5.0.2 and stock LGE 5.0.2 doesn't work with a KitKat bootstack perhaps this doesn't either.

Again, this is a theory right now and I cannot be absolutely sure about this.