Oceanic biocube 29 glass or acrylic

quick question can anyone confirm what the second light switch on the bio cube 29 gallon controls i beleive its for the LED night lights but not really sure its not turning them off they stay on all the time not sure switch might be bad.

My two switches on the top control my two lights one switch for each light
 
Maybe someone should take a hammer to one to find out if it's glass or not....manufacturer should YouTube a demo to end all confusion
 
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