This is an independent educational blog, not a licensed electrical contractor. For any actual electrical work, hire a licensed electrician.
Lighting & Fixtures

Lighting & Fixtures

Bulbs, dimmers, and fixture basics — informational only.

CKT 68 Lighting · Beginner

No Neutral at the Switch: Why Some Light Switches Need a White Wire

The timer switch sat in its box for two weeks before an electrician told me it would not work on that wall. There was no white wire in there for it to land on, and for most of wiring history there was no reason there would be.

7 min
CKT 63 Lighting · Beginner

Closet Lights: The Clearance Rule That Rules Out a Bare Bulb

Our hall closet came with a bare bulb on a porcelain holder, and I had it filed under charming. The rule against it is about a shape the Code draws in the closet, and that shape moves when you add a shelf.

7 min
CKT 58 Lighting · Beginner

Track Lighting: Why the Heads and the Rail Have to Match

I ordered three replacement heads that looked exactly right and none of them worked. The letter on the listing is shorthand; the label inside the channel names a manufacturer and a series.

7 min
CKT 53 Lighting · Beginner

Low-Voltage Landscape Lighting: What the 12 Volts Covers

The garden half is genuinely low risk. The 120-volt half at the wall is not, and that is where most of the trouble lives.

7 min
CKT 48 Lighting · Beginner

What Holds Your Light Fixture Up: Ceiling Boxes and Weight Limits

Fifty pounds for a light, a separate listing for a fan. The small object above the canopy decides what you're allowed to hang.

7 min
CKT 44 Lighting · Beginner

Damp, Wet, or Dry: The Rating That Decides Where a Fixture Can Go

Fixtures are listed dry, damp, or wet — and the middle category is where the mistakes happen. Why a covered porch isn't automatically a damp location.

7 min
CKT 38 Lighting · Beginner

Recessed Lighting and the IC vs. Non-IC Rating

IC-rated or not? Why the label stamped inside a recessed can decides whether attic insulation can safely touch it — and when to call a pro.

6 min
CKT 33 Lighting · Beginner

Light Color Temperature: What the Kelvin Number on a Bulb Means

The confusing Kelvin number, decoded — why 2700K feels cozy, 5000K feels clinical, and how the scale runs backward from what the word 'warm' suggests.

6 min
CKT 13 Lighting · Beginner

LED vs. Incandescent vs. CFL: What Actually Changed

Why watts stopped being a useful comparison, and how to shop by lumens across bulb types.

6 min
CKT 14 Lighting · Reference

Understanding Dimmer Switch Compatibility

Why LED bulbs can flicker or buzz on older dimmers, and what "dimmable" and "LED-compatible" labeling means.

6 min
CKT 15 Lighting · Beginner

Why Do My Lights Flicker? Common Causes Explained

From a loose bulb to a loose wiring connection, ranked from most to least benign — and when to call a pro.

6 min
CKT 16 Lighting · Beginner

Smart Switches and Smart Bulbs: What's the Difference?

Two ways to add smart lighting, the tradeoffs of each, and how to pick the one that fits your home.

6 min
CKT 27 Lighting · Reference

Light Bulb Codes Explained: A19, E26, BR30 and Friends

Every bulb code answers two questions — glass shape and base size — and both follow one simple rule. Decode A19, E26, BR30 and the rest so a bulb swap always buys the right bulb.

6 min
CKT 28 Lighting · Beginner

Why the Wattage Rating Inside a Fixture Matters

The MAX 60W sticker is a heat budget, not a brightness limit. What overlamping quietly does to sockets and wiring — and why LED actual watts make the math work in your favor.

6 min