From 2013 U.S. Food Code - Chapter 6: Physical Facilities

Functionality

6-202.11 Light Bulbs, Protective Shielding.
(A) Except as specified in ¶ (B) of this section, light bulbs shall be shielded, coated, or otherwise shatter-resistant in areas where there is exposed FOOD; clean EQUIPMENT, UTENSILS, and linens; and unwrapped SINGLE-SERVICE and SINGLE-USE ARTICLES.
(B) Shielded, coated, or otherwise shatter-resistant bulbs need not be used in areas used only for storing food in unopened packages, if:
     (1) The integrity of the packages cannot be affected by broken glass falling onto them; and
     (2) The packages are capable of being cleaned of debris from broken bulbs before the packages are opened.
(C) An infrared or other heat lamp shall be protected against breakage by a shield surrounding and extending beyond the bulb so that only the face of the bulb is exposed.

6-202.13 Insect Control Devices, Design and Installation.
(A) Insect control devices that are used to electrocute or stun flying insects shall be designed to retain the insect within the device.
(B) Insect control devices shall be installed so that:
     (1) The devices are not located over a FOOD preparation area; and
     (2) Dead insects and insect fragments are prevented from being impelled onto or falling on exposed FOOD; clean EQUIPMENT, UTENSILS, and linens; and unwrapped SINGLE-SERVICE and SINGLE-USE ARTICLES.

Link to the 2013 U.S. Food Code