user14716: So I purchased a 4 channel Relay which handles AC250V 10A ; DC30V 10A.
But am I able to connect this to replace a light switch so I can automate it?  My bedroom runs on 15 amps.

http://amazon.com/gp/product/B00VHVIBAM?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

user19409: All mains electrical work should be performed by a fully qualified electrician.
Yes, this relay board will easily switch a light bulb.
A note on current: A single 100 Watt incandescent globe will only draw 0.83 Amps at 120V AC (0.416 Amps at 240V AC). The equation I used: I=P/V. You would start coming close to the maximum rating after 10 globes (although I advise staying well below the maximum).
You mention that your bedroom runs on 15 Amps, which I assume means that the mains runs through a 15 Amp circuit breaker (or fuse). This circuit breaker will trip if the total current to all devices after it exceeds 15 Amps.
A similar question was asked by Matthieu Napoli over on the Electrical Engineering Stack Exchange site. There are a number of high quality answers there that would be helpful for you. Worthiest to mention is Cybergibbons answer where he recommends using the PowerSwitch Tail as a very safe way of switching mains voltage. You don't need an electrician when using the PowerSwitch Tail providing the light you are controlling has the matching plugs.

14716: <p>So I purchased a 4 channel Relay which handles AC250V 10A ; DC30V 10A.
But am I able to connect this to replace a light switch so I can automate it?  My bedroom runs on 15 amps.</p>

<p><a href="https://i.stack.imgur.com/8rZDF.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8rZDF.jpg" alt="relay board"></a></p>

<p><a href="http://rads.stackoverflow.com/amzn/click/B00VHVIBAM" rel="nofollow noreferrer">http://amazon.com/gp/product/B00VHVIBAM?psc=1&amp;redirect=true&amp;ref_=oh_aui_detailpage_o00_s00</a></p>
 19409: <h1>All mains electrical work should be performed by a fully qualified electrician.</h1>

<p>Yes, this relay board will easily switch a light bulb.</p>

<p>A note on current: A single 100 Watt incandescent globe will only draw 0.83 Amps at 120V AC (0.416 Amps at 240V AC). The equation I used: I=P/V. You would start coming close to the maximum rating after 10 globes (although I advise staying well below the maximum).</p>

<p>You mention that your bedroom runs on 15 Amps, which I assume means that the mains runs through a 15 Amp circuit breaker (or fuse). This circuit breaker will trip if the total current to all devices after it exceeds 15 Amps.</p>

<p>A <a href="https://electronics.stackexchange.com/q/33312/104097">similar question</a> was asked by Matthieu Napoli over on the Electrical Engineering Stack Exchange site. There are a number of high quality answers there that would be helpful for you. Worthiest to mention is <a href="https://electronics.stackexchange.com/a/33366/104097">Cybergibbons answer</a> where he recommends using the <a href="http://www.powerswitchtail.com/" rel="nofollow noreferrer">PowerSwitch Tail</a> as a very safe way of switching mains voltage. You don't need an electrician when using the PowerSwitch Tail providing the light you are controlling has the matching plugs.</p>
