The study investigated daylight illumination in the school workshop as a determinant for effective students' task performance in workshop practice. 183 NCE Technical students in 300 Level which comprised of 73 and 112 students from Federal Colleges of Education (Technical), Asaba and Omoku, Nigeria respectively during the 2008/2009 academic session was used for the study The daylight Illumination Task Performance Questionnaire (DITPQ) was used to collect data. The students perceived that there was inadequate daylight illumination of the school workshop and it negatively affected effective students' task performance workshop practice; and no significant difference existed in the students' mean perception scores of daylight illumination in the school workshop as a determinant for their effective task performance in workshop practice.