LED Color - CM700 Modem

Can someone help me understand what the different LED colors mean on my CM700 cable modem.? There are two "lightning bolt" symbols. I noticed my internet speed was very slow and ran speed test which confirm low speed ~ 10mbps. I happen to look at my modem and both "lightning bolt symbols were amber color. The internet connection symbol was solid green and acitivity symbol was blinking green. I turned off the power to my modem and waited 20 seconds. Turned power back on and all lights came back green. Took another speed test and everything was back to normal > 75mbps. I can't find any information on what color means on my cable modem. All other modems I have used tell you what colors means. THere appears to be a direct connnection to the amber color and slow speeds and I would like to know what the cause is.