A bit of mathematics at the end of the week. The

The first table shows three different installations. The old one is equipped with T8 fluorescent lamps that are at the end of their lifetime and dirty. That is why the luminous flux is so low for the 60W tube. In this situation, the need for a replacement is present. The choice is between a fluorescent tube, a LED tube or a completely new installation with controls. Controls reduce the average power consumption to 1/3 and less of the original load. We can estimate the new fixtures will consume 12W only when connected to controls that detect presence in the hall and reduce the lighting level in areas that are not in use. Each light point will be replaced. It is (often) possible to reduce the number of fixtures with a new installation. The example is concentrating on a one-by-one replacement to make it easier to understand.

The table above shows the sum of all costs for running and maintaining the installation each year and in total. The Retrofit Solution reaches an ROI after 2 years already. The New Installation with controls is going to turn back the high investment after 10 years. Both LED solutions do better than the conventional one, save energy and CO2 emissions. Let’s go green with LED light sources!

A good number of the calls I get during an average day at work fall into two categories;   customers who call to have something installed in their electrical system, and customers who tried to install it themselves and are calling me to come and fix the mistakes they made.  There’s certainly nothing wrong with trying to perform basic electrical work yourself if you have a good grasp on proper electrical safety techniques and what you’re doing.  On the other hand, there’s nothing wrong with calling a top Dallas electrician to do the work for you either.  The best way to ensure the job is done right every time is to hire an honest, hardworking professional electrician who’ll stand behind his work.

Even tasks that can seem quite simple can be treacherous if you’re not sure what you’re doing.  This comes into play a lot when a homeowner is trying to perform a three-way switch installation.  It seems a lot easier to install than it really is; I generally recommend homeowners not attempt to install three-way switches without at least a electrician on the phone to walk you through the process.  Keep the following in mind:

There are tasks well suited for the do-it-yourself minded homeowner, though.  The easiest is wall outlet replacement, which is usually a very simple, straightforward procedure.   That doesn’t mean the haystack isn’t free of the odd needle that you can hurt yourself on, though.  Here are some of the more common problems I run into, along with some typical solutions or hints to keep them from happening to you: