Steps to reproduce:

1) Download attached project and open in Unity
2) In Hierarchy window, select Sparks >> Inspector window >> enable Lights module
3) Build and Run 'ShurikenScene1' on a device
Note that light of shuriken is almost invisible

Expected result: Light of the shuriken should be much brighter on the surfaces (check attached video 'expected.mp4')
Actual result: Light of the shuriken is almost invisible (check attached video 'actual.mp4')

Reproduced with:
2017.2.0a1, 2017.2.0b5, 2017.3.0a2

Not reproduced with:
5.6.3f1, 2017.1.0p2

Regression since:
2017.2.0a1

Devices under testing:
Google Pixel, OS:7.1.2, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:google/sailfish/sailfish:7.1.2/NJH47D/4045516:user/release-keys

Lge LG H850, OS:7.0, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:lge/h1_global_com/h1:7.0/NRD90U/170931540650d:user/release-keys

Samsung SM G950U, OS:7.0, CPU:arm64-v8a, GPU:Adreno (TM) 540, Build:samsung/dreamqltesq/dreamqltesq:7.0/NRD90M/G950USQU1AQC8:user/release-keys

iPhone SE Apple A7 GPU, iOS 9.3.3

Samsung SM G935F, OS:7.0, CPU:arm64-v8a, GPU:Mali-T880, Build:samsung/hero2ltexx/hero2lte:7.0/NRD90M/G935FXXU1DQEP:user/release-keys