"Ionizing radiation" means alpha and beta particles, electrons, protons, neutrons, gamma and X-ray, and all other radiations which produce ionizations directly or indirectly, but does not include electromagnetic radiations other than gamma and X-rays.
"Self-luminous compound" means any mixture of phosphorescent material and radium, mesothorium, or other radioactive element.
"Workroom" includes the entire area bounded by walls of solid material and extending from floor to ceiling.
Haw. Code R. § 12-25-44