Reproduction steps:
1. Open the attached project;
2. Build "Scene" scene to device;
3. Open an app in the device;
4. Click "Load 5_3_8f1" until it shows "Load Resources";
5. Load any furniture;
6. Toggle "Direction light", "Spot light" or "Point light" to enable or disable lighting;

Actual result: the Spot Light on low-end devices is too bright ("Comparison.jpg").
Expected result: the Spot Light on low-end devices should be normal as on high-performance devices ("Comparison.jpg").

Reproduced with: 5.6.0b4, 5.6.0f1, 5.6.1p3, 2017.1.0b9, 2017.2.0a3
Not reproducible with: 5.4.5p3, 5.5.4f1, 5.6.0a1, 5.6.0b1
Regression introduced in 5.6.0b2

Devices under test:

Reproducible with:
Samsung SM G800F (Galaxy S5 Mini)*, OS:5.1.1, CPU:armeabi-v7a, GPU:Mali-400 MP, Build:samsung/kminiltexx/kminilte:5.1.1/LMY47X/G800FXXU1BPC4:user/release-keys

Samsung GT S5310*, OS:4.1.2, CPU:armeabi-v7a, GPU:VideoCore IV HW, Build:samsung/corsicassxx/corsicass:4.1.2/JZO54K/S5310XXAME2:user/release-keys

Not reproducible with:
Samsung GT I9505*, OS:4.2.2, CPU:armeabi-v7a, GPU:Adreno (TM) 320, Build:samsung/jfltexx/jflte:4.2.2/JDQ39/I9505XXUAMDM:user/release-keys

Sony D6603 (Xperia Z3)*, OS:6.0.1, CPU:armeabi-v7a, GPU:Adreno (TM) 330, Build:Sony/D6603/D6603:6.0.1/23.5.A.1.291/2769308465:user/release-keys

Verizon SM G930V*, OS:6.0.1, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:Verizon/heroqltevzw/heroqltevzw:6.0.1/MMB29M/G930VVRU2APG3:user/release-keys

Samsung SM G903F*, OS:6.0.1, CPU:armeabi-v7a, GPU:Mali-T720, Build:samsung/s5neoltexx/s5neolte:6.0.1/MMB29K/G903FXXU1BQC1:user/release-keys

Verified with 2017.2.0b2
Backported to 5.6.2p4, 2017.1.0p1