Found this......
NOTE: These T5 endcaps actually mount by "snapping in" to a rectangular hole...(no screw holes) So, unless you have a hole cut perfectly for them to "snap" in to, you will definately need to purchase the "stand-offs" for them. (sold separately)(the "stand-offs" have screw holes for mounting)
And this....
Waterproof Endcaps Installation Instructions
* All endcaps must be mounted utilizing screws, gaskets and standoffs.
* The maximum ambient working temperature for IceCap endcaps is 230°F (110°C). Proper ventilation in an enclosed hood is necessary to avoid heat from building up around your endcaps, which grip the hottest part of your lamps. (The added benefit to venting off heat is your fluorescent lamps will have a longer life and increased lumen output.)
* All lead wires inserted into the endcaps must be stripped exactly 5/16", with a tolerance of +/- 1mm. All lead wires must be solid or tinned 18 AWG and UL approved for 600V applications.
* The collar should only be tightened to a snug fit, DO NOT over tighten as this can crack the endcap or the lamp. Please be sure to insert and turn the lamp 90 degrees before tightening the collar.
* Do not submerge lamps or endcaps, if they do become wet use a towel or cloth to wipe them dry. If they do become submerged replace lamps and endcaps immediately.
* Do not disassemble endcaps to clean contacts. With proper installation and use, no salt or corrosion can penetrate the endcaps.
* Do not remove inserted wires from wire traps, as this will fatigue the contacts and will eventually effect the connection points.
* Be sure to avoid endcap contact with any of the following substances:
o Chlorinated Solvents
o Aromatic Hydrocarbons
o Animal or Vegetable Fatty acids.
* 100% Silicone may be applied to the insertion points after all wires have been inserted, if so desired, but is not necessary.
* All IceCap endcaps are UL-Listed and approved to IP66 & IP67 as waterproof.
* IceCap, Inc. recommends the use of a certified or licensed electrician for the installation of any of its electrical products.
