As a design pro, you know all too well how lighting can make or break a room.

According to the late, great American interior designer, Albert Hadley: “Design is defined by light and shade, and appropriate lighting is enormously important.” Indeed: good lighting can infuse fresh life into dark, dim spaces — while harsh, overly-bright illumination can ruin an otherwise beautifully designed room. Drab, underlit spaces not only do a huge disservice to furniture and décor, but can actually strain the eyes and affect mood and productivity.

Whether you’re looking for purely functional under-cabinet lighting, or a work-of-art chandelier that will create a dramatic first impression in an entryway, there have never been more options for finding quality lighting online — in every style and price point.

Here are the top sites to source the pendants, sconces, task lighting, chandeliers, floor and table lamps, outdoor illumination, and more you need to add that all-important layer of flawless lighting to your client projects.

1stDibs

Looking for the right vintage and antique lighting fixtures for clients can often feel like looking for a needle in a proverbial haystack. Not so with 1stDibs. Even though the website boasts over a million items for instant purchase or at auction, the helpful filters really help designers drill down to find just the right lamps and lighting fixtures.

Sure, there are the usual parameters like price, material, and dimensions. But you can also narrow down results by very specific styles and periods, as well as creator, color, country of origin, and numbers in the set (from one to a dozen+).

Plus, the Trade 1st program offers design pros discounts of up to 30%, with additional customer support and comprehensive purchase protection.

AllModern

Sleek, modern, and streamlined mid-century and contemporary lighting fixtures can often swallow up more than their fair share of a client’s budget. But AllModern stocks a huge inventory of pendant lights, arc floor lamps, contemporary chandeliers, and more — with a ton of options for under $250 that look far pricier. (Case in point: the $243 matte black Davita Mid-century 3-arm chandelier, which is indecipherable from models that can four times as much.) There’s also a wide array of outdoor lighting options like sconces and lanterns, as well as hard-to-find specialty bulbs.

Design pros can score trade discounts, expedited shipping, and more perks for AllModern and its sister brand, Wayfair (which also has a huge selection of lighting options) by joining Wayfair Professional.

Arteriors

The company that began as a boutique home accessories line has made quite a name for itself in today’s lighting world. Arteriors boasts over a thousand sleek and stylish artisan designs, and hundreds of new ones are added to the selection each year. Their search options are particularly helpful for interior designers scouting options for client projects: in addition to the usual filters like color, material, and style, you can narrow results down by less common categories like design shape, wire rating, global certification, and compliancy.

Design Within Reach

“Our name embodies the mission of our company: to make well-designed products easily accessible to design-savvy professionals,” reads the first sentence of the premiere DWR catalog, which landed in mailboxes in 1999. Back then, DWR’s founder, Rob Forbes, realized that Americans had little access to home furnishings from design icons by Eames, Le Corbusier, Saarinen, and the like. They were “out of reach,” and he wanted to fix that.

A quarter of a century later, DWR is still one of the country’s top sources for artful mid-century and contemporary home designs. The website lets you peruse by common lighting types (like ceiling and pendant lamps, sconces, ceiling fans, floor lamps, etc.), as well as collections from makers like Herman Miller, Flos, and Louis Poulsen.

Gantri

This innovative lighting brand leverages digital manufacturing technologies and partners with talented emerging creators from around the globe to create lighting that’s unique, affordable, and sustainable too.

The selection is organized into four categories: table, floor, wall, and clamp lights. We love it for playful and distinct designs like TOMBOGO’s Bag Table Light and Karim Rashid’s Kobble task light. There are just shy of 300 styles in their current collection, and all (yes, all!) are under $500.

Lamps Plus

The name says it all: over the past 45 years, this LA-based mega resource has become the nation’s largest lighting retailer, with over 90,000 designs from famous brand names, and over 20 exclusive lines.

In addition to the usual categories, Lamps Plus is also a great source for niche lighting needs, with curated collections specifically for path lighting, solar-powered options, and fixtures to hang over billiards tables and kitchen islands.

Lumens

Founded 20 years ago in the Bay area, this leader in the lighting industry merged with YLighting in 2016. Today, it represents an impressive 400-some design brands from around the globe. You’ll find both iconic designers, and newcomers in its extensive inventory. The website’s search parameters are more specific than the usual, making it easier for designers to find specific types of lighting, like under-cabinet lighting and linear suspension fixtures. You can also browse curated collections like LED lighting, sustainable options, and exclusive pieces that can’t be found anywhere else.

Mitzi

This Hudson Valley-based company was created in honor of Grandma Mitzi, a painter and antique collector who inspired two younger generations of the family to launch a lighting company in her name. Grandma Mitzi had a knack for finding pieces that were well-designed, well-made, and well-priced, and the lighting company aims to carry on that tradition with classic-contemporary designs that are functional, beautiful, and affordable to boot.

Rejuvenation

Opened in 1977 as an architectural salvage, lighting, and hardware restoration shop, this west coast lighting source is a favorite for chandeliers and pendants (both new and vintage), track lighting, flush mounts, lamps, sconces, and custom fixtures. We also love its selection of more niche fixtures, like landscape and deck illumination, and picture lights.

Rejuvenation is an especially great option for clients who want high-quality fixtures on a budget, or for projects with tight timelines. There are loads of options under $500, and you browse “in stock & ready to ship” and “quick ship” stock to find fixtures that will arrive and be ready to install fast.

Schoolhouse

Dedicated to the preservation of American manufacturing, this Portland, Oregon-based lighting company strives to create “a new generation of heirlooms.”

While some of its lamps, pendants, sconces, and flush-mount fixtures have mid-century, 1930s, or contemporary vibes, many feel classic and timeless. We also love its selection of sconces, ceiling fans, and other fixtures designed for outdoor use.

Design pros can register for a trade account to get 20% off retail prices at Schoolhouse, as well as its sister brands, Food52 and Dansk.

Serena & Lily

Known for its lighting options elevating natural materials like rattan, wicker, shells, and wood beads, Serena & Lily is a go-to source for clients with traditional, preppy, or coastal chic vibes. We especially like their creative, beachy designs like the coral-inspired Sanibel Sconce, and Breakers Rattan Floor Lamp, a playful 6.5-ft representation of a palm tree with “coconuts” that glow.

Visual Comfort & Co.

If you’re looking for lighting from some of today’s hottest celeb designers, head to high-end retailer Visual Comfort. Their all-star roster includes buzzy lines from Christiane Lemieux, Kelly Wearstler, Barbara Barry, Ellen DeGeneres, and Thomas O'Brien — to name a few — in addition to its own distinctive designs.

West Elm

Designers know and love West Elm as a dependable source for reasonably priced sofas, bedding, rugs, and dec pillows. But don’t forget that it stocks a stellar selection of lamps and lighting fixtures too. We especially like WE’s selection of chandeliers, which includes affordable Sputnik, capiz, globe, and LED styles.

It can be helpful to use their shop-by-room filters, which will show you options for the bedroom, dining room & kitchen, living room, bathroom & vanity, and outdoor spaces.