position as shown in fig4 further a plurality of bevels may be provided a bevel 301 is provided at a front end of the housing 203 for matching the bevel at the front end of the base board 202 the bevel 301 as shown is used for indicating the insertion direction for inserting the card type led driver so that the card type led driver will not be inserted along an opposite direction at least one of both sides of the housing 203 is provided with a square shaped groove 302 the groove 302 engages with a buckle 211 of the card tray 200 during assembling to form a detachable buckle connection structure and then the card type led driver can be fixed the housing 203 can be formed by injection molding as a housing which is capable of being assembled with the base board 202 alternatively the base board 202 can be directly plastic packaged by the housing 203 so that the housing 203 is fixed with the base board 202 to form an entirety one basic structure of the replaceable driver circuit board 210 may include an intelligent control chip group 205 and an interface chip group 206 related electronic elements of the intelligent control chip group 205 and the interface chip group 206 can be directly mounted on a surface of the base board 202 by providing the intelligent control chip group 205 and the interface chip group 206 in the replaceable driver circuit board 210 intelligent controls on the led lamp can be achieved including a single lamp control and controls after accessing a control network also a wireless communication transceiver can be provided in the interface chip group 206 so as.