The led panel light could light more areas than the downlight fixtures do. However, it needs an electrical outlet to be mounted into the ceiling and takes more space than downlights. As for the downlight fixture, it occupies less space in the ceiling and usually is used for emphasizing some position. Then, in the following parts, the author would show some products to help you further understand the applications of led panel light and downlight light.
Led Ceiling Panel Light

Description:
This LED ceiling panel is good lighting solution for residence, library, and hospital.
Recessed IP44, square 30W 36w 40w led ceiling panel 1200x300
Model No.: VP30120
Brand: Vertex
MOQ: 100pcs
Production ability: 100,000pcs per month
Payment terms: 30% as deposit and balance should be paid before shipment.
Original: China
Certificate: CE, RoHS
Package: White/grey box for inner package, carton for outer package. Need to collect extra fee for customized color box.
Bedroom Downlights

8W Dimmable led downlights F6084(V6084) is the star product of Vertex Lighting. Speaking of the light source and driver, we select high quality chip and dimmable driver. F6084(V6084) meets requirement of BS476, 30, 60, 90 mins fire protection . It owns relevant international certification, like CE, RoHS for EU market and SAA for Australian market.
An tilt IP44 rated version of the luxury range of Dimmable led downlights from Integral. These fully integrated downlights contain everything you need including an LED light source and LED driver.
Conclusion
All in all, each kind of led light has its on advantages. Compared with the led downlighters, the led panel light is a good lighting solution to repalce existing fluorescent conventional office ceiling lights. And the downlighter takes less ceiling space and consume less electricity, so it is good option for small-size room.