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Funding InformationFAPEMIG. CAPES. CNPq. LED-to-LED communication, in which an LED is used as both transmitter and receiver, is n ubiquitous technology that presents important advantages such as low-cost devices and security enhancement. We investigate the performance of visible light LED-to-LED communication under realistic conditions. We analyze the impact on transmission performance imposed by different colors of LEDs and their combinations. In sum, our results evidence the importance of a correct LED setup. According to our results, lower frequency LEDs such as red and orange are highly efficient when used as receivers, while higher frequency LEDs are less sensitive and therefore more limited in these scenarios. Moreover, we highlight that the pattern created by a wide range of LEDs can be helpful for new visible light communication-based mechanisms. KEYWORDS evaluation, internet of light, LED-to-LED communication, li-fi, visible light communication 1 INTRODUCTION Recently, visible light communication (VLC) has received great attention from industry and the academic community. In fact, due to the spectrum crunch of Wi-Fi, VLC has been seen as a complementary alternative to radio frequency communication. Moreover, VLC opens a new horizon for several new applications such as indoor localization, vehicle-to-vehicle communication, and underwater communication.Choosing the proper transmitter (TX) and receiver (RX) for a VLC system plays a key role in the achieved performance. The light emitted by LEDs is modulated to provide both illumination and communication. Several factors such as the type of LED, bandwidth, illumination power, and color have a direct impact on the performance. In this context, choosing the right LED is very important in VLC scenarios, especially when the VLC system supports bidirectional communication between LEDs.Many parameters and environment conditions can affect LED-to-LED communication performance. For instance, LED illumination varies in terms of distance and field-of-view. Communication using LED also suffers influence from ambient light. In summary, choosing the receiving mechanism is crucial because photodiodes (PDs) are much more sensitive than low power LEDs.In this paper, we investigate the use of LEDs as both transmitter and receiver in a VLC system. We evaluate the impact of LED color combination and distance in VLC performance, considering realistic environments. We have conducted our analysis using OpenVLC, 1 an open-source Linux-based VLC platform.