External driver mounted on top PMMA Light Guided Panel (LGP) does not turn yellow.
LED PANEL, 1 X 4, 100~277V, 40W, 105LM/W, CRI 80, PMMA, 0~10V DIMMABLE, 3500K, UL & DLC 4.9 Current (mA): 1050mA 36V DC Frequency Range: 50Hz~60Hz Total harmonic distortion: ≤15 % Operating temperature: -68ºF~104ºF Rated life: 50,000 hrs.