[iceeedr]

This way, I think.

public fl(ent)
{
	// check if entity isn't valid
	if(!pev_valid(ent))
		return;
	
	// new variable for origin and get origin of entity
	static Floatrigin[3];
	pev(ent,pev_origin,origin);
	
	// send the light flash
	message_begin(MSG_BROADCAST,SVC_TEMPENTITY);
	write_byte(27); // TE_DLIGHT
	write_coord(floatround(origin[0])); // x
	write_coord(floatround(origin[1])); // y
	write_coord(floatround(origin[2])); // z
	write_byte(radius); // radius
	write_byte(255); // r
	write_byte(255); // g
	write_byte(255); // b
	write_byte(255); // life
	write_byte(60); // decay rate
	message_end();	
}