Codeigniter within directory htaccess

I have a codeigniter project light inside the folder projects, it looks like this site.com/projects/light. For some r开发者_开发问答eason the standard .htaccess will not route all calls to index.php. What needs to be changed or added?

RewriteEngine on
RewriteCond $1 !^(index\.php|assets|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

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It looks like the RewriteRule is redirecting to /index.php, rather than /projects/light/index.php.