---
product_id: 97379783
title: "1875 Rapitest Suncalc Sunlight Calculator"
brand: "luster leaf"
price: "S$65"
currency: SGD
in_stock: true
reviews_count: 1
url: https://www.desertcart.sg/products/97379783-1875-rapitest-suncalc-sunlight-calculator
store_origin: SG
region: Singapore
---

# Tracks 12-hour accumulated sunlight exposure Long-lasting battery included for uninterrupted use Measures PAR light for optimal plant growth 1875 Rapitest Suncalc Sunlight Calculator

**Brand:** luster leaf
**Price:** S$65
**Availability:** ✅ In Stock

## Summary

> ☀️ Grow smarter, not harder—sunlight mastery in your hands!

## Quick Answers

- **What is this?** 1875 Rapitest Suncalc Sunlight Calculator by luster leaf
- **How much does it cost?** S$65 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/97379783-1875-rapitest-suncalc-sunlight-calculator)

## Best For

- luster leaf enthusiasts

## Why This Product

- Trusted luster leaf brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready-to-Go Power:** Includes a long-lasting battery so you can start measuring immediately.
- • **12-Hour Sunlight Tracking:** Capture a full half-day of solar energy to optimize garden placement.
- • **Precision PAR Measurement:** Pinpoint the exact sunlight your plants crave for thriving growth.
- • **Season-Long Solar Insight:** Designed to gauge solar energy throughout the growing season for maximum yield.
- • **Effortless Plant Placement:** Know exactly where your plants want to be—no guesswork, just growth.

## Overview

The 1875 Rapitest Suncalc Sunlight Calculator precisely measures Photosynthetically Active Radiation (PAR) to help you optimize plant placement by tracking 12 hours of accumulated sunlight. Designed for the growing season, it includes a long-lasting battery for immediate, reliable use.

## Description

Luster Leaf1875 Rapitest Suncalc Sunlight Calculator

## Features

- Measures Photosynthetically Active Radiation (PAR) light, which drives photosynthesis in plants
- Measures the amount of accumulated PAR light for 12 hours in a specific garden location
- Helps you put your plants where they want to be
- Designed to measure the amount of solar energy available during the growing season
- Long lasting battery included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 15.24 x 7.62 x 10.16 cm; 90.72 g |
| Part number | 1875 |
| Item display height | 3 inches |
| Item display length | 10 inches |
| Item display width | 8 inches |
| Item display weight | 113 g |
| Power source type | Battery Powered |
| Manufacturer | Luster Leaf |
| Item model number | 1875 |
| ASIN | B002XZLLXU |

## Images

![1875 Rapitest Suncalc Sunlight Calculator - Image 1](https://m.media-amazon.com/images/I/717qJPFMVdL.jpg)

## Available Options

This product comes in different **Style Name** options.

## Questions & Answers

**Q: Can anyone explain why 38% of reviews are 5 star and 31% are 1 star? Is it just that the product is not waterproof?**
A: I am not sure, but I have bought two. Neither lasted 90 days. They sent me a set of new batteries, but that did not solve the problem. It is perhaps the moisture. I discarded them as the 2 I was able to figure out the light level of the area in question. The 5 star/1 star differential probably is how often they are used.

**Q: What does partial shade mean?  How many hours of sun is "partial shade."  Why aren't the designations made clear?**
A: Approximately 2-6 hours of sun.  Part shade means more shade than sun during the 12 hours the test runs.  Part sun means more sun than shade during the 12 hours the test runs. It's not as definitive as many of us would like and depends on where you live.  In Texas where it is very hot with intense sun, part shade definitely means afternoon shade.

**Q: I don't see any numbers or dials on it. How do you know how many hours of direct sunlight?**
A: It has a 12 hours preset which starts when you turn it on.  It will flash the full 12 hours and then end with a solid light next to your sunlight factor.  you really want to set it just before sunrise to get the most accurate reading.

**Q: I have the suncalc. Does anyone else flash and not give a solid led reading?**
A: If it doesn’t do what the directions say I would return it.  Our first one was broken or the battery was dead because it wouldn’t even turn on.  The second one did exactly what the instructions called for.

## Customer Reviews

### ⭐ it only works if that day there isn't a single ...
*by L***E on 24 November 2016*

it only works if that day there isn't a single cloud in the sky. Does it ever happen in UK?

## Frequently Bought Together

- Luster Leaf 1875 Rapitest Suncalc Sunlight Calculator
- AH-20Plus DLI Meter.Full Sun,Partial Sun,Partial Shade,Shade.Sun Hours.Sunlight Meter for Gardening,Long Lifetime

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**Shop now:** [https://www.desertcart.sg/products/97379783-1875-rapitest-suncalc-sunlight-calculator](https://www.desertcart.sg/products/97379783-1875-rapitest-suncalc-sunlight-calculator)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-20*