user3626: I need to power a light bulb or something like 110 V or 220 V at normal amperage for TV or something at that range like a fan...
My micro-controller is an Arduino with 5 V out and 12 V max out trough transistor switch.
To my understanding a stepper motor drive could be a viable option to enable the relays... I can even control current, right?
Up to 8 channels
Could this work better?

user27157: The first one you have seems fine (in my opinion). Note though that relays are something not to be cheap with. They can cause dangerous accidents if you buy them from a cheap supplier (chinese). I'll always go for a local supplier (don't know where you live so I can't tell). Make sure to check Radioshack and stores like that.
Also make sure that you find one with a datasheet. No datasheet = no specs. No specs = you don't know the max of your relay which is BAD. The max of a relay should be known and respected or something bad can happen.

user27388: You can use a 5V Solid-State Relay module to control light bulbs. They cost $4-6 from US-based suppliers and $1-3 from a Chinese supplier. Just hook up the supply to the center pin and the load to either the NO or NC pin. Supply 5V to the module and wire a digital pin to the module to control it.

3626: <p>I need to power a light bulb or something like 110 V or 220 V at normal amperage for TV or something at that range like a fan...</p>

<p>My micro-controller is an Arduino with 5 V out and 12 V max out trough transistor switch.</p>

<p>To my understanding a stepper motor drive could be a viable option to enable the relays... I can even control current, right?</p>

<p><a href="http://www.ebay.com/itm/5V-1-2-4-6-8-Channel-Relay-Board-Module-Optocoupler-LED-for-Arduino-PiC-ARM-AVR-/371642356980?var=&amp;hash=item56879c54f4:m:mgnWPfoXCbjWi3z8ochdzrw" rel="nofollow">Up to 8 channels</a></p>

<p><a href="http://www.ebay.com/itm/5V-8-Channel-Low-Level-Trigger-Arduino-Solid-State-Relay-Module-with-Fuse-250V2A-/191963613200?hash=item2cb1ec4810:g:fc8AAOSwwPhWlcTF" rel="nofollow">Could this work better?</a></p>
 27157: <p>The first one you have seems fine (in my opinion). Note though that relays are something not to be cheap with. They can cause dangerous accidents if you buy them from a cheap supplier (chinese). I'll always go for a local supplier (don't know where you live so I can't tell). Make sure to check Radioshack and stores like that.</p>

<p>Also make sure that you find one with a datasheet. No datasheet = no specs. No specs = you don't know the max of your relay which is BAD. The max of a relay should be known and respected or something bad can happen.</p>
 27388: <p>You can use a <a href="http://rads.stackoverflow.com/amzn/click/B00VRUAHLE" rel="nofollow">5V Solid-State Relay module</a> to control light bulbs. They cost $4-6 from US-based suppliers and $1-3 from a Chinese supplier. Just hook up the supply to the center pin and the load to either the NO or NC pin. Supply 5V to the module and wire a digital pin to the module to control it.</p>
