Projector Buying Guide: 4K vs FHD, ANSI Lumens & Throw Distance

A projector can deliver a 100″+ cinema screen experience for a fraction of what a large TV costs. But choosing the wrong one means a dim, washed-out image or a projector that doesn’t fit your room. This guide covers every key decision for Indian buyers in 2025.

Resolution: 4K vs Full HD

Full HD (1080p) projectors are excellent for screens up to 120″ in dark rooms and offer strong value. 4K projectors deliver four times the pixel density — noticeably sharper on large screens, and essential for HDR content. In 2025, 4K projectors have come down significantly in price — if your budget allows, go 4K. You’ll see the benefit on any screen over 80″.

Brightness: ANSI Lumens Explained

DLP vs LCD vs Laser

DLP (Digital Light Processing) uses millions of micro-mirrors. Delivers sharp, high-contrast images. Most home cinema projectors use DLP. Occasional “rainbow effect” visible to some viewers. LCD (3LCD in Epson projectors) uses three panels for bright, accurate colour. No rainbow effect. Great for well-lit rooms. Laser projectors replace the lamp with a laser light source, offering 20,000+ hour lamp life, instant-on/off, and consistent brightness over time. Premium choice for permanent installations.

Throw Distance — Short vs Long Throw

• Standard throw: Needs 2.5–4m from screen. Most home projectors. Best image quality.
• Short throw: 0.5–1.5m from screen. Good for smaller rooms. Some light fall-off at edges.
• Ultra-short throw (UST): Sits right against the wall. Under 30cm throw distance. No shadows from people walking past. LG CineBeam HU715QW is a UST example.

Screen Pairing

A projector is only as good as its screen. A plain white wall introduces hotspots and colour inaccuracy. A fixed frame screen offers the best image flatness for dark rooms. A motorised screen is ideal for living rooms where the screen is hidden when not in use. For rooms with ambient light, an ALR (Ambient Light Rejecting) screen dramatically improves contrast and colour saturation.

Placing the Projector in Your Room

Measure before you buy. First, measure the throw distance your room actually offers, from the projector position to the wall. Second, confirm the screen size you want fits that wall at that distance. Third, prefer an ultra-short-throw projector only where its under-30cm placement is genuinely achievable in your room. No new throw-ratio figures are needed for this check: distance, wall space and placement honesty are what prevent a projector that does not fit.

Matching Brightness to Your Room

Match lumens to your actual room, not to brightness alone. A dedicated dark room needs the least brightness. A curtained evening room needs more. A typical Indian living room used at night needs more again. Daylight-tolerant use needs the most, and is where buyers most often under-buy. Work out which room you really have, then choose from the brightness bands in this guide.

Frequently Asked Questions

Is 4K worth it on a screen under 80 inches? It depends on viewing distance: up close the extra detail shows, and from a typical sofa distance the difference narrows, as the resolution section explains. Does a laser projector really save money versus lamp replacement? Over its life, yes for heavy users: no lamp replacements and steadier brightness, though the upfront price is higher. Can I use a plain white wall instead of a screen? You can, but a screen’s coating improves contrast and colour, and an ambient-light-rejecting screen makes a dramatic difference in rooms with ambient light.