High Power LEDs, Landscape lighting, LED Lighting Controller

 Lite-On LTW-170TK in Reel. Yellow 2 x 1.25 x 1.1 mm 130° Tinted/Diffused 450 mcd 3.8 V LED Surface Mount.

https://www.futureelectronics.com/p/semiconductors--optoelectronics--leds/ltw-170tk-lite-on-9452400